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05-Nov-2025
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INTEGRATED MAINS AND PRELIMS MENTORSHIP (IMPM) KEY (05/11/2025)

INTEGRATED MAINS AND PRELIMS MENTORSHIP (IMPM) 2025 Daily KEY

 
 
 
 
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Foreign Direct Investment (FDI) and  Small Modular Reactors (SMRs) its significance for the UPSC Exam? Why are topics like Commission for Air Quality Management (CAQM), India’s carbon emission, Cyclones important for both preliminary and main exams? Discover more insights in the UPSC Exam Notes for November 05, 2025
 
 
 

Net FDI inflow fell by 159% in August: RBI’s data reveals

For preliminary Examination:  Current events of national and international Significance like Foreign Direct Investment

For Mains Examination: GS III - Economy

Context:

Net Foreign Direct Investment (FDI) into India fell 159% in August, with more money leaving the country than entering it, according to official data. This is the second time this financial year that outflows have exceeded inflows

Read about:

Foreign Direct Investment (FDI)

Key takeaways:

 

  • Foreign Direct Investment (FDI) refers to an investment made by an individual, company, or government from one country into business interests located in another country.
  • Unlike portfolio investment, which involves buying financial assets such as stocks or bonds, FDI involves a lasting interest and significant control in a foreign enterprise.
  • This usually means acquiring at least 10% ownership in a company abroad, or establishing new business operations such as factories, offices, or infrastructure projects.
  • FDI is considered a key driver of globalization because it allows the movement of capital, technology, and management expertise across borders.
  • For instance, when a multinational corporation like Toyota sets up a car manufacturing plant in India, it brings not only investment funds but also advanced technology, production methods, and employment opportunities. This helps boost industrial development in the host country.
  • There are generally two main forms of FDI. The first is Greenfield investment, where a company builds new facilities from scratch in the host country. This type often generates new jobs and infrastructure.
  • The second is Brownfield investment or mergers and acquisitions (M&A), where an existing company in the host country is purchased or merged with the foreign investor’s enterprise. This allows quicker market entry and access to existing customer bases.
  • FDI can take place in different sectors—manufacturing, services, infrastructure, and technology are among the most common. Governments of developing countries, including India, actively encourage FDI by offering incentives such as tax breaks, relaxed regulations, and the creation of special economic zones (SEZs), as FDI contributes to economic growth, employment, and technological advancement.
  • However, FDI also comes with challenges. Excessive dependence on foreign capital can make an economy vulnerable to external shocks. Some critics argue that foreign investors may repatriate profits rather than reinvest them locally, and that large multinational corporations could influence domestic policies to favor their interests.
  • In India, FDI is regulated under the Foreign Exchange Management Act (FEMA), 1999, and is overseen by the Department for Promotion of Industry and Internal Trade (DPIIT).
  • The country follows two routes: the automatic route, where investment does not require prior government approval, and the government route, where approval is necessary in sensitive sectors such as defense or media.
  • Over the years, liberalization policies have made India one of the most attractive destinations for FDI, with inflows directed toward sectors like information technology, telecommunications, and renewable energy

 

Additional Information

 

  • According to official data, India witnessed a sharp 159% decline in net Foreign Direct Investment (FDI) in August 2025, as capital outflows surpassed inflows. This marked the second instance in the current financial year when more money exited the country than entered it.
  • Nonetheless, the broader trend over the first five months of the financial year presents a contrasting picture. Between April and August 2025, net FDI was over 121% higher than in the corresponding period of the previous year.
  • In August 2025, gross FDI inflows amounted to $6,049 million — a fall of 30.6% from August 2024 and 45.5% from July 2025 — representing the weakest monthly inflows so far in this financial year.
  • Meanwhile, repatriation and disinvestment by foreign investors operating in India reached $4,928 million in August 2025. This was 5.4% lower than a year earlier but almost 30% higher than the previous month. On the other hand, outward investments made by Indian companies dropped by 29.7% to $1,736 million, their lowest level in the current fiscal year.
  • As a result, net FDI — the difference between total inflows and outflows — stood at a negative $616 million in August 2025, indicating that more funds were withdrawn than invested during the month. A similar situation had occurred earlier in May 2025, though on a smaller scale, when net FDI was recorded at -$5 million.
  • For the April–August 2025 period, net FDI amounted to $10,128 million, marking a 121% increase compared with the same timeframe last year. This improvement was supported by an 18.2% rise in gross inflows (reaching $43,760 million) and a 6.1% decline in repatriation and disinvestment (totaling $21,205 million).
  • Additionally, foreign investments made by Indian companies abroad rose to $12,427 million during this period — nearly 26% higher than in the corresponding months of the previous financial year

 

Follow Up Question

Mains

1.Despite a temporary dip in net Foreign Direct Investment (FDI) inflows in certain months, India continues to witness strong long-term foreign investment trends. Discuss the factors influencing short-term fluctuations in FDI and evaluate their implications for India’s economic stability and growth

Note: This is a reference answer structure and a model answer
 

Introduction (40–50 words)

  • Define Foreign Direct Investment (FDI) briefly — as a long-term investment by foreign entities in domestic businesses.

  • Mention the recent context — net FDI into India turned negative in August 2025 but showed strong growth over the April–August 2025 period.

  • End with a transition: “This reflects short-term volatility within a broader positive investment trajectory.”

Body (150–170 words)

A. Factors Influencing Short-term Fluctuations in FDI

  • Global factors: Economic slowdown, rising interest rates in developed economies, geopolitical tensions, and risk aversion by investors.

  • Domestic factors: Policy uncertainty, regulatory delays, rupee depreciation, or profit repatriation by multinational corporations.

  • Sectoral and cyclical trends: Seasonal disinvestment cycles or lower inflows due to project completion phases.

  • Outward FDI trends: Increased overseas investment by Indian companies may offset incoming flows.

B. Implications for India’s Economy

  • Short-term impact: Pressure on forex reserves and the rupee; potential volatility in capital markets.

  • Long-term stability: Continued gross inflows and lower disinvestment indicate investor confidence in India’s fundamentals — robust market size, policy reforms, and production-linked incentive (PLI) schemes.

  • Policy response: Need for consistent reforms, ease of doing business, and protection of investor confidence

Conclusion (30–40 words)

Summarize that while monthly FDI variations are natural in a dynamic global environment, India’s structural strengths and policy initiatives continue to make it an attractive long-term investment destination.

Introduction:

Foreign Direct Investment (FDI) refers to long-term capital inflows from foreign entities into domestic enterprises, often bringing technology, employment, and managerial expertise. Recent data shows that India’s net FDI turned negative in August 2025, with more outflows than inflows. However, between April and August 2025, net FDI was over 120% higher than the same period last year, indicating that short-term volatility exists within an overall positive investment trajectory.

Body:

Factors Influencing Short-term Fluctuations:
Short-term variations in FDI arise due to a mix of global and domestic factors. Globally, rising interest rates in developed economies, geopolitical tensions, and fears of economic slowdown can reduce risk appetite among investors. Domestically, policy uncertainty, currency depreciation, and profit repatriation by multinational corporations may lead to temporary capital outflows.
Additionally, sectoral cycles — such as project completion or reduced activity in manufacturing and services — and increased outward FDI by Indian companies can also alter the monthly balance of inflows and outflows.

Implications for Economic Stability:
A short-term fall in FDI may put pressure on forex reserves, affect the rupee’s stability, and create temporary investor hesitation. However, the overall increase in gross inflows and fall in disinvestment suggest strong investor confidence in India’s fundamentals — driven by reforms, ease of doing business, and Production Linked Incentive (PLI) schemes.

Conclusion:

While temporary dips in FDI reflect global financial volatility, India’s large market size, policy reforms, and stable macroeconomic environment continue to attract sustained foreign investment. Thus, short-term fluctuations are cyclical, but the long-term growth prospects for FDI in India remain robust.

 

Prelims 

 1.Both Foreign Direct Investments (FDI) and Foreign Institutional Investor (FII) are related to investment in a country. (UPSC CSE 2011)

 
Which one of the following statements best represents an important difference between the two?
A.FII helps bring better management skills and technology, while FDI only brings in capital
B.FII helps in increasing capital availability in general, while FDI only targets specific sectors C.FDI flows only into the secondary markets, while FII targets primary market
D.FII is considered to the more stable than FDI
 
Answer (B)
 
 

  • Foreign Direct Investment (FDI):
    It involves long-term investment by a foreign entity in a country’s productive assets or enterprises, such as factories, plants, or businesses. FDI usually brings technology transfer, management skills, and employment, and it targets specific sectors like manufacturing, services, or infrastructure.

  • Foreign Institutional Investment (FII):
    It refers to investment by foreign entities in financial markets of a country, such as stocks, bonds, and other securities. FIIs primarily aim at short-term financial returns and help increase liquidity and capital availability in the market.
 
 

Small Modular Reactors(SMRs)

For Preliminary Examination:  Current events of national and international Significance like modular reactors

For Mains Examination: GS III Achievements of Indians in science & technology

Context:

Reliance Industries Ltd, India’s largest private sector corporation, Tata Power, and Adani Power are among six private entities that are learnt to have formally expressed interest to set up small modular nuclear reactor-based projects.

 

Read about:

How are SMRs different from traditional nuclear reactors?

What are the challenges in developing SMRs?

 

Key takeaways:

 

  • Small Modular Reactors (SMRs) are compact nuclear reactors with a capacity ranging from 30 MWe to 300 MWe per unit. They are being increasingly viewed as crucial for ensuring that nuclear energy remains commercially viable, particularly at a time when large-scale nuclear projects across the world are facing delays in execution.
  • Although SMRs generate roughly one-third of the electricity that traditional nuclear power plants can produce, they are still capable of supplying significant amounts of low-carbon energy.
  • Their flexibility makes them attractive for energy-intensive industries such as steel, aluminium, and cement. Moreover, they can be installed by retrofitting existing thermal power plant sites that are due for decommissioning, thereby giving a second life to old infrastructure.
  • Nuclear power is uniquely positioned as a clean, continuous source of electricity that helps overcome the intermittency problem of renewable sources like solar and wind. Against this backdrop, New Delhi has been actively promoting SMRs, highlighting their potential to decarbonise industries while also projecting India as a leader in advancing this technology.
  • In response to tenders issued by the state-owned Nuclear Power Corporation of India Limited (NPCIL) for the proposed Bharat Small Modular Reactors (BSMRs), major companies such as Hindalco Industries, JSW Energy, and Jindal Steel have shown interest. Six states — Gujarat, Madhya Pradesh, Odisha, Andhra Pradesh, Jharkhand, and Chhattisgarh — have collectively earmarked around 16 potential sites for these reactors.
  • The proposed BSMRs will be built and operated under NPCIL’s supervision, with the corporation maintaining operational authority and asset ownership, while private bidders will have beneficial rights to the electricity produced for captive consumption.
  • Globally, two SMR projects are already functional. Russia’s Akademik Lomonosov, a floating nuclear plant with two 35 MWe modules, began operations in May 2020.
  • In China, the HTR-PM demonstration project was connected to the grid in December 2021 and reportedly entered commercial operation in December 2023.
  • For India, the BSMR initiative is not only part of its clean energy transition but also a step toward embedding SMRs in its foreign policy as a technology-led offering. However, India faces technological challenges.
  • Its civil nuclear programme has traditionally relied on pressurised heavy water reactors (PHWRs) of 220 MWe and above, which use natural uranium and heavy water. These are increasingly considered outdated compared to pressurised water reactors (PWRs) — light-water designs that dominate the global nuclear energy landscape.
  • To address this gap, India is pursuing a mixed-technology approach. The Bhabha Atomic Research Centre (BARC) is developing at least three indigenous SMR prototypes across different reactor designs. Simultaneously, India is seeking to collaborate with countries like the US and Russia, which already have advanced capabilities in SMR and light-water reactor technologies.
  • At the policy level, the government is in the process of amending key legislations governing the nuclear sector. The objective is to harmonise India’s legal framework with international standards, remove investor uncertainties, and pave the way for greater participation in the civil nuclear energy market

 

 Follow Up Question

Mains

1."Small Modular Reactors (SMRs) are being seen as a game-changing technology in the global clean energy transition. Discuss their significance for India in terms of energy security, industrial decarbonisation, and foreign policy. What challenges must India overcome to successfully adopt SMRs?"

Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
 

Introduction (40–50 words)

  • Define SMRs and provide context on their growing importance.

  • Briefly mention their relevance to India’s clean energy transition.

Body (150–170 words)

A. Significance for India

(i) Energy Security:

  • Diversifies India’s energy mix, reducing dependence on coal and imported fossil fuels.

  • Can be deployed in remote or small grids, improving energy access.

  • Lower construction time and modular scalability enhance reliability.

(ii) Industrial Decarbonisation:

  • Provides carbon-free heat and power for heavy industries.

  • Facilitates clean hydrogen production, supporting the National Green Hydrogen Mission.

  • Enables India to meet its Net Zero 2070 commitment.

(iii) Foreign Policy & Strategic Relevance:

  • Strengthens India's role as a responsible nuclear power.

  • Encourages cooperation under civil nuclear deals with the US, France, Russia, and Japan.

  • Enhances soft power by offering SMR partnerships to developing nations in South Asia and Africa.

Challenges to Adoption

  • Legal/Institutional: Private sector participation restricted under the Atomic Energy Act (1962).

  • Economic: High upfront costs and lack of domestic manufacturing ecosystem.

  • Regulatory: Need for updated safety and licensing norms for modular systems.

  • Social/Environmental: Public concern over safety and radioactive waste management

Conclusion (30–40 words)

  • Conclude with a balanced assessment and reform-oriented way forward.

Introduction:

Small Modular Reactors (SMRs) are advanced nuclear reactors with a capacity of up to 300 MW per unit—about one-third of conventional nuclear power plants. Globally, they are gaining prominence for their scalability, enhanced safety, and lower cost, making them crucial in the clean energy transition. For India, SMRs offer a unique opportunity to achieve energy security, industrial decarbonisation, and strategic leverage in global energy diplomacy

Body:

1. Significance for India

a) Energy Security:

  • India’s rising energy demand and limited fossil fuel reserves make SMRs a reliable, low-carbon alternative.

  • Modular design allows phased deployment near industrial clusters or remote regions, reducing transmission losses.

b) Industrial Decarbonisation:

  • SMRs can provide steady heat and power for hard-to-abate sectors such as steel, cement, and chemicals.

  • Integration with hydrogen production can help India meet its National Green Hydrogen Mission targets.

c) Foreign Policy and Strategic Dimension:

  • SMRs enhance India’s credibility as a clean energy leader and align with global climate commitments under the Paris Agreement.

  • Potential collaborations with the US, France, and Russia under civil nuclear agreements can strengthen technological and diplomatic ties.

2. Challenges

  • High capital cost and limited private participation due to Atomic Energy Act restrictions.

  • Need for updated regulatory frameworks and safety norms for modular designs.

  • Public apprehensions regarding nuclear safety and waste management.

  • Limited domestic manufacturing and supply chain readiness

Conclusion:

SMRs represent a transformative pathway for India’s energy transition—combining reliability, decarbonisation, and geopolitical advantage. However, realizing their potential demands policy reforms, global partnerships, and public confidence-building to ensure safe, affordable, and sustainable deployment
 
Prelims
 
1.In India, why are some nuclear reactors kept under "IAEA Safeguards" while others are not? (UPSC 2020)
A. Some use uranium and others use thorium
B. Some use imported uranium and others use domestic supplies
C. Some are operated by foreign enterprises and others are operated by domestic enterprises
D. Some are State-owned and others are privately-owned

 

Answer (B)
 

The International Atomic Energy Agency (IAEA) Safeguards apply to civilian nuclear facilities using imported fuel. India, after the Indo–US nuclear deal (2008) and the waiver from the Nuclear Suppliers Group (NSG), agreed to place certain reactors under IAEA safeguards.

  • Reactors using imported uranium (to ensure it is not diverted for weapons) → ✅ brought under IAEA safeguards.

  • Reactors using indigenous/domestic uranium for India’s strategic program → ❌ kept outside safeguards, giving India flexibility for weapons-grade material.

Now let’s check options:

A. Some use uranium and others use thorium → Incorrect. Not the reason.
B. Some use imported uranium and others use domestic supplies → ✅ Correct.
C. Some are operated by foreign enterprises and others by domestic enterprises → Incorrect. All reactors are operated by Indian agencies.
D. Some are State-owned and others are privately-owned → Incorrect. All nuclear reactors are state-owned in India.
 
 

Have ‘green’ crackers brought down pollution?

For Preliminary Examination: Current events of national and international Significance

For Mains Examination: GS III - Environment and Ecology

Context:

In the run-up to Deepavali, the Supreme Court legalised the sale of “green” crackers, in a bid to balance three competing interests: the “sentiments” of the people during the festive season; the pollution caused due to the burning of firecrackers; and livelihood concerns of those employed in the firecracker industry. The largely small-scale informal sector has been hit by the cracker ban in the National Capital Region since 2018.

 

Read about:

CSIR-National Environmental and Engineering Research Institute (NEERI)

Commission for Air Quality Management (CAQM)

 

Key takeaways:

 

How are ‘green’ crackers made?

  • In 2018, the CSIR–National Environmental Engineering Research Institute (NEERI) in Nagpur developed a new generation of firecrackers called “green crackers.” These were designed to reduce particulate emissions by 30% to 80%, without compromising on brightness, safety, or shelf life.
  • The key innovation lay in altering the chemical composition — replacing harmful compounds like barium nitrate and antimony with safer alternatives. The modifications included using zeolite additives, boron-based compounds that release water to suppress dust, and metallic composites that enhance combustion efficiency and temperature.
  • For instance, the eco-friendly version of the popular “flower pot” cracker contains a blend of water and lime, which releases moisture during combustion, helping dust particles settle rather than remain airborne.
  • NEERI’s tests reportedly showed a 30% drop in particulate matter (PM10 and PM2.5), alongside lower emissions of sulphur dioxide and nitrogen oxides.
  • Similarly, the “SWAS” bomb formulation uses a mix of potassium nitrate, aluminium, sulphur, and proprietary additives to achieve similar emission reductions. These innovations have been showcased in fireworks hubs like Sivakasi, Tamil Nadu

 

What has been the uptake?

  • NEERI also established a Standard Operating Procedure (SOP) for registering manufacturers and transferring green cracker technology. Only producers licensed by the Petroleum and Explosives Safety Organisation (PESO) can register with NEERI. As of this year, nearly 1,500 manufacturers, mostly from Tamil Nadu and West Bengal, have obtained such licences.
  • However, the term “green cracker” is somewhat misleading, as these products are not completely emission-free. In fact, NEERI researchers have described them as “Reduced Emission Fireworks” — a more accurate label. Despite this, the Supreme Court continues to refer to them as “green” in official orders

Are they really less polluting?

  • Although laboratory tests suggest a 30% reduction in particulate pollution, there is limited real-world verification of these claims. The Supreme Court, while acknowledging the innovation, noted that overall air quality levels between 2018 and 2024 have not shown significant improvement.
  • During the Deepavali season, air quality in the Delhi-NCR region continued to deteriorate, aggravated by seasonal factors like low wind speeds and stubble burning in Punjab.
  • Hence, while green crackers represent a technological step forward, their actual environmental benefit in urban conditions remains uncertain

 

Follow Up Question

Mains

1.The development of ‘green crackers’ by CSIR-NEERI represents an effort to balance cultural traditions with environmental sustainability. Critically evaluate the effectiveness of green crackers in addressing air pollution challenges during festive seasons in India.”
(250 words)

 

Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
 

Introduction (40–50 words)

  • Start with the context: festive air pollution and legal intervention.

  • Define green crackers and their purpose.

Body

A. Scientific and Policy Background (60–70 words)

  • Explain who developed them and how they work.

  • Mention chemical innovation and policy mechanism.
    Key points:

  • Developed by CSIR–NEERI, approved by PESO.

  • Reduce PM10, PM2.5, SOâ‚‚, NOx by 30–80%.

  • Replace barium and antimony with safer compounds like zeolites and boron-based reagents.

  • Include examples: SWAS, SAFAL, STAR.

Effectiveness and Positive Aspects (60–70 words)

  • Scientific trials show emission reduction.

  • Technology transfer to over 1,500 manufacturers, mainly in Tamil Nadu and West Bengal.

  • Promote eco-friendly celebrations and reduce public health risks.

  • Represent a middle path between tradition and sustainability

Critical Evaluation / Limitations (60–70 words)

  • Lab results not replicated in real-world conditions.

  • Lack of public awareness and enforcement.

  • Pollution peaks due to multiple sources (stubble burning, weather).

  • “Green” label misleading—should be termed Reduced Emission Fireworks.

  • Supreme Court noted no significant improvement in Delhi-NCR’s air quality.

Conclusion (40–50 words)

  • Summarize the balance between culture and ecology.

  • Suggest a way forward.
    Example:
    Green crackers are a progressive step toward sustainable celebrations but remain only a partial solution. Strengthening regulation, promoting awareness, and encouraging community-based, non-polluting alternatives are essential for achieving long-term environmental sustainability without eroding cultural values.
Introduction:
Air pollution in India reaches alarming levels during festive seasons, especially after Diwali, largely due to the bursting of firecrackers. In 2018, the CSIR–National Environmental Engineering Research Institute (NEERI) developed ‘green crackers’ to reduce emissions while preserving the cultural essence of celebrations. These are designed to emit 30–80% less particulate matter and fewer toxic gases compared to traditional fireworks.
 

Body:
Green crackers achieve emission reduction through innovative chemical formulations, replacing harmful compounds like barium nitrate with safer additives such as zeolites, boron-based compounds, and metallic composites that improve combustion efficiency. Varieties like SWAS, SAFAL, and STAR have been developed to reduce PM10, PM2.5, SOâ‚‚, and NOx emissions.

NEERI, in coordination with PESO, has provided technology transfer and licensing mechanisms to ensure safe manufacturing. Over 1,500 manufacturers, mainly from Tamil Nadu and West Bengal, have adopted this technology.

However, the effectiveness of green crackers remains debated. Laboratory reductions do not always translate into real-world air quality improvements, as festive pollution is influenced by multiple factors — weather conditions, stubble burning, vehicular emissions, and enforcement lapses. The Supreme Court has also noted limited improvement in overall air quality despite their introduction

Conclusion:
While green crackers mark a positive step towards eco-conscious celebration, they are not a complete solution. Their success depends on strict regulation, public awareness, and a gradual cultural shift towards non-polluting alternatives. Sustainable festivities must blend scientific innovation with responsible citizen behavior

 

Prelims

1.In the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of Air Quality Index? (UPSC 2016)
  1. Carbon dioxide
  2. Carbon monoxide
  3. Nitrogen dioxide
  4. Sulfur dioxide
  5. Methane

Select the correct answer using the code given below:

A. 1, 2 and 3 only     

B. 2, 3 and 4 only   

C. 1, 4 and 5 only     

D. 1, 2, 3, 4 and 5

Answer (B)
 

The Air Quality Index (AQI) in India, as defined by the Central Pollution Control Board (CPCB) under the National Air Quality Monitoring Programme (NAMP), measures 8 key pollutants to assess air quality.

These are:

  1. Particulate Matter (PM10)

  2. Particulate Matter (PM2.5)

  3. Nitrogen Dioxide (NOâ‚‚)

  4. Sulphur Dioxide (SOâ‚‚)

  5. Carbon Monoxide (CO)

  6. Ozone (O₃)

  7. Ammonia (NH₃)

  8. Lead (Pb)

 

  • Carbon Dioxide (COâ‚‚) ❌ — Not included in AQI calculation because it is not a pollutant affecting short-term air quality; it’s a greenhouse gas impacting climate change.

  • Carbon Monoxide (CO) ✅ — Included.

  • Nitrogen Dioxide (NOâ‚‚) ✅ — Included.

  • Sulphur Dioxide (SOâ‚‚) ✅ — Included.

  • Methane (CHâ‚„) ❌ — Not included in AQI, though it is a greenhouse gas.
 
 

IIP growth dips to three-month low of 4% in Sept

For Preliminary Examination: Current events of national and international Significance
 
For Mains Examination: GS III - Economy
 
Context:
 
Industrial activity dipped marginally to a three-month low of 4% in September. The data also show that the growth in industrial activity during the first half of the financial year was the slowest in at least five years.
 
Read about:
 
 
What is Industrial Production (IIP)?
 
Goods and Services Tax (GST)
 
 
Key takeaways:
 
 
  • Industrial activity in India witnessed a slight slowdown, slipping to a three-month low of 4% in September 2025, according to the latest data. Figures also indicate that industrial growth during the first half of the 2025–26 financial year has been the weakest in at least five years.
  • The Index of Industrial Production (IIP), published by the Ministry of Statistics and Programme Implementation, recorded a 3.2% growth rate in September 2024. After gaining momentum and touching 4.3% in July 2025, growth has once again moderated. Overall, the IIP expanded by 3% during April–September 2025, marking the slowest pace of growth in half a decade.
  • Comparatively, industrial growth in the first half of 2021–22 stood at 24%, largely because of the low base created by the pandemic year 2020–21. It subsequently slowed to 7% in 2022–23, 6.3% in 2023–24, and 4.1% in 2024–25.
  • The recent dip in output was mainly attributed to a decline in mining, primary goods, and consumer non-durables. The mining sector contracted by 0.45% in September 2025, compared to a strong 6.6% growth in August and 0.2% in September last year.
  • Meanwhile, the consumer non-durables segment continued to shrink for the second month in a row, falling 2.9% in September after a 6.4% decline in August, in contrast to a 2.2% expansion a year ago.
  • Economist Madan Sabnavis, Chief Economist at the Bank of Baroda, suggested that this downturn could be temporary, as the Goods and Services Tax (GST) rate cuts for the sector were implemented late in the month. He noted that “the real impact of these cuts may become visible in October or November, as retailers work through existing inventories priced before the revision.”
  • In contrast, the consumer durables segment showed a strong recovery, posting a 10.2% rise in September 2025, up from 3.5% in August and 6.3% in September 2024. The primary goods sector, however, experienced a slowdown, growing 1.4% in September, compared to 5.4% in August and 1.8% in the same month last year.
  • The manufacturing sector offered a brighter note, with growth accelerating to 4.8% in September 2025, up from 3.8% in August and 4% in September 2024, signaling resilience amid a broader industrial moderation
 
 
Index of Industrial Production (IIP)
 
  • The Index of Industrial Production (IIP) is a key economic indicator that measures the overall growth and performance of India’s industrial sector over a specific period of time. It essentially tracks changes in the volume of production of a selected set of industrial goods and serves as a short-term measure of industrial activity in the country.
  • Published every month by the National Statistical Office (NSO) under the Ministry of Statistics and Programme Implementation (MoSPI), the IIP reflects the level of output in various industries such as manufacturing, mining, and electricity.
  • By comparing the current output to that of a chosen base year (currently 2011–12), it helps policymakers, economists, and analysts understand whether industrial activity is expanding or contracting.
  • The IIP is expressed as an index number, with the base year value fixed at 100. If the index for a given month is, for instance, 120, it means that industrial production has grown by 20% compared to the base year.
  • The index covers a broad basket of industrial products, categorized into three main sectors — manufacturing, mining, and electricity — and further divided into use-based classifications such as primary goods, capital goods, intermediate goods, and consumer goods (durables and non-durables).
  • The manufacturing sector carries the largest weight in the IIP (about 77%), making it the most influential component of the index. This means fluctuations in manufacturing output have a significant impact on the overall IIP number.
  • The importance of the IIP lies in the fact that it provides real-time insights into industrial health, helping guide decisions on monetary and fiscal policy. For instance, consistent growth in the IIP suggests a strengthening economy, while a decline signals slowing industrial momentum — often prompting policy adjustments to boost demand or production
 
Follow Up Question
 
Mains
1.The Index of Industrial Production (IIP) serves as a vital indicator of India’s industrial and economic health. However, it has often been criticized for its limited scope and outdated base year. Discuss the significance of the IIP in policymaking and evaluate the challenges associated with its compilation and interpretation. (250 Words)
 
Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
 

Introduction (40–50 words)

Begin by defining the IIP and its purpose. Mention its relevance as a short-term indicator of industrial performance and overall economic momentum.

Significance of IIP (80–90 words)

Explain how IIP helps in policymaking and economic planning. Link it with macroeconomic management and industrial policy formulation.

Points to include:

  • Acts as a barometer of industrial health and short-term economic growth.

  • Provides insights for monetary policy formulation by the RBI to control inflation or stimulate growth.

  • Assists the government in assessing sectoral performance and designing industrial, manufacturing, and energy policies.

  • Helps identify structural bottlenecks in specific sectors such as capital goods or consumer goods.

  • Serves as an important input for GDP estimation and economic forecasting.

Challenges and Limitations (80–90 words)

Critically examine the issues that limit the accuracy and utility of IIP data.

Points to include:

  • Outdated base year (2011–12) that doesn’t capture emerging industries like renewable energy or electronics.

  • Limited coverage — excludes informal and small-scale sectors which contribute significantly to industrial output.

  • Lag in data collection and reporting, affecting timeliness.

  • Volatility and revision of data lead to confusion in trend analysis.

  • Inadequate representation of services, which are a major component of the economy today.

Conclusion (20–30 words)

End with a balanced assessment.

Example:
While the IIP remains a crucial indicator of India’s industrial strength, addressing its methodological and structural gaps is essential to ensure evidence-based economic policymaking.

Introduction:

The Index of Industrial Production (IIP) is a vital statistical measure compiled by the National Statistical Office (NSO) under the Ministry of Statistics and Programme Implementation (MoSPI). It tracks the changes in the volume of production across key sectors — manufacturing, mining, and electricity — and serves as a short-term indicator of industrial growth. As a core measure of India’s economic performance, it provides crucial insights into the pace and pattern of industrial activity, thereby influencing policy formulation

Body:

The IIP holds significant importance in economic policymaking. It helps the Reserve Bank of India (RBI) and the government in assessing industrial trends, monitoring inflationary pressures, and designing monetary and fiscal interventions. The index also aids in GDP estimation, evaluation of industrial policies, and sector-specific planning. Through its sectoral and use-based classification, it enables a better understanding of demand trends across capital goods, consumer goods, and infrastructure-related industries.

However, the IIP faces several limitations. Its base year of 2011–12 has become outdated, failing to reflect structural changes and new industries such as renewable energy, electronics, and green manufacturing. The index also suffers from limited coverage, as it excludes informal and small-scale sectors that contribute significantly to India’s output. Additionally, data delays, frequent revisions, and high monthly volatility affect its reliability for real-time analysis and decision-making

Conclusion:

While the IIP continues to be an indispensable tool for gauging industrial health, updating its base year, broadening coverage, and integrating digital data sources are essential to enhance its accuracy and relevance for evidence-based economic policymaking

 
 
 
 
Prelims
 
In India, in the overall Index of Industrial Production, the Indices of Eight Core Industries have a combined weight of 37.90%. Which of the following are among those Eight Core Industries? (UPSC CSE 2012)
1. Cement
2. Fertilizers
3. Natural gas
4. Refinery products
5. Textiles
Select the correct answer using the codes given below:
A. 1 and 5 only       B. 2, 3 and 4 only           C. 1, 2, 3 and 4 only         D. 1, 2, 3, 4 and 5
 
Answer (C)
 

The Eight Core Industries (ECI) represent the major sectors of the Indian economy that have a significant impact on overall industrial production. Together, they account for 37.90% weight in the Index of Industrial Production (IIP).

The Eight Core Industries are:

  1. Coal

  2. Crude Oil

  3. Natural Gas

  4. Refinery Products

  5. Fertilizers

  6. Steel

  7. Cement

  8. Electricity

Textiles is not one of the core industries.

Hence, the correct combination is:
Cement (1), Fertilizers (2), Natural Gas (3), and Refinery Products (4)
 
For Preliminary Examination: Current events of national and international Significance
 
For Mains Examination: GS I - World Geography
 
Context:
 
If you think of a cyclone as a machine, it would be an incredibly powerful entity — an engine that draws heat from the earth’s tropical waters to drive destructive winds, heavy rainfall, and storm surges. Similar storms are known variously as hurricanes in the Atlantic and eastern Pacific Oceans, and typhoons in the western Pacific Ocean.
 
Read about:
 
How do cyclones form?
 
How are cyclones classified?
 
 
Key takeaways:
 
 

How Cyclones Form?

  • Tropical cyclones originate from regions of low atmospheric pressure, often accompanied by clusters of thunderstorms. For such a weather disturbance to intensify into a cyclone, several favourable oceanic and atmospheric conditions must align.
  • The most crucial factor is warm sea surface temperature, usually above 26.5°C, extending to a depth of around 50 metres. When moist air from this warm surface ascends, it cools and condenses into clouds, releasing latent heat in the process.
  • This heat further warms the surrounding air, promoting more upward movement and drawing in additional moist air from below — thus initiating a self-sustaining convection cycle.
  • Another key requirement is an unstable atmosphere, where rising air continues to ascend freely. Additionally, the Coriolis effect—caused by the Earth’s rotation—must be strong enough to induce the system’s spin. Because this effect is minimal near the equator, cyclones rarely form within five degrees latitude of it.
  • Conversely, vertical wind shear (the variation in wind speed and direction with altitude) should be low; otherwise, the developing cyclone’s structure becomes disrupted.
  • As the storm matures, a distinct central region known as the “eye” forms — a calm zone surrounded by an eyewall of intense thunderstorms that produce the cyclone’s strongest winds and heaviest rains.
  • Air converges at the surface toward the low-pressure centre, rises rapidly around the eyewall, and diverges outward at higher altitudes, completing the system’s circulation
 

Cyclone Classification

  • Cyclones intensify as long as they remain over warm ocean waters, drawing energy from continuous evaporation and condensation. Their classification is based mainly on maximum sustained wind speed and central pressure, though the naming conventions differ slightly across ocean basins.
  • In the North Indian Ocean, the India Meteorological Department (IMD) classifies systems from a “depression” (31–49 km/h) to a “super cyclonic storm” (above 222 km/h).
  • To monitor and measure these systems, meteorologists rely on a combination of ground observations, satellite imagery, ocean buoys, and, in some regions, aircraft reconnaissance. Satellites are particularly vital for tracking storms over open seas — infrared sensors estimate cloud-top temperatures (indicating intensity), while microwave and visible imagery reveal storm structure, rainfall, and eye formation.
  • In the North Atlantic, specially equipped aircraft known as “Hurricane Hunters” penetrate cyclones to measure wind speed, temperature, humidity, and pressure, using instruments called dropsondes that transmit data as they descend.
  • Over the Indian Ocean, however, most information is obtained from satellite data and automated buoys rather than manned flights
 
Follow Up Question
 
Mains
 
1.Tropical cyclones are heat engines driven by oceanic and atmospheric interactions.” Explain the conditions required for their formation and discuss how technological advancements have improved their monitoring and classification
 
Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
 

Introduction 

  • Begin by defining tropical cyclones in simple scientific terms.

  • Highlight their energy source — latent heat from warm oceans.

  • Mention their global significance in heat and moisture transfer

Body (Main Content – 150–170 words)

A. Conditions Required for Cyclone Formation

Use bullet points for clarity and mention both oceanic and atmospheric conditions.

  • Warm Sea Surface Temperature: Above 26.5°C up to 50 m depth.

  • High Humidity and Atmospheric Instability: Supports deep convection.

  • Coriolis Force: Enables rotation, absent near the equator.

  • Low Vertical Wind Shear: Maintains system structure.

  • Pre-existing Low-Pressure Area: Acts as a seed for development.

🔹 Add a brief line on structure:
As it matures, the cyclone develops a calm eye, an eyewall of intense convection, and spiral rain bands

Monitoring and Classification (Technological Advancements)

Organize in points or subheadings.

  • Satellite Technology: Real-time infrared and microwave imagery for tracking intensity and structure.

  • Ocean Buoys: Record sea surface temperature and atmospheric pressure.

  • Aircraft Reconnaissance: ‘Hurricane Hunters’ collect direct data (wind, humidity, pressure).

  • Numerical Weather Prediction Models: Improved forecasting accuracy.

  • IMD Classification: From Depression (31–49 km/h) to Super Cyclonic Storm (>222 km/h)

Conclusion (30–40 words)

  • Summarize the importance of understanding cyclones.

  • Link science to disaster preparedness and resilience

Introduction

Tropical cyclones are intense low-pressure systems that originate over warm oceanic waters and derive their energy from the release of latent heat due to condensation. They play a vital role in the global heat balance by transferring energy from the tropics to temperate regions

Body

1. Conditions for Cyclone Formation:

  • Warm Sea Surface Temperature: Above 26.5°C up to a depth of 50 m, providing necessary heat and moisture.

  • Atmospheric Instability: Allows continuous ascent of moist air and formation of cumulonimbus clouds.

  • Coriolis Force: Sufficient rotation (at least 5° latitude away from the equator) to initiate cyclonic spin.

  • Low Vertical Wind Shear: Ensures organized circulation; high shear disrupts cyclone development.

  • Pre-existing Low Pressure: Acts as a triggering mechanism for convergence of winds.

As the system matures, an eye and eyewall develop — the eye being calm, surrounded by intense convection and heavy rainfall.

2. Advances in Monitoring and Classification:

  • Satellite Technology: Infrared, visible, and microwave sensors provide real-time data on cloud structure, temperature, and storm intensity.

  • Ocean Buoys: Measure sea surface temperature and pressure in remote oceanic areas.

  • Aircraft Reconnaissance: “Hurricane Hunters” in the Atlantic collect direct data on wind speed and pressure using dropsondes.

  • IMD Classification System: Categorizes cyclones from depression (31–49 km/h) to super cyclonic storm (>222 km/h).

Conclusion

Tropical cyclones, though destructive, are natural mechanisms of heat redistribution. With advancements in satellite meteorology and ocean observation systems, prediction accuracy and early warning capabilities have significantly improved, aiding disaster preparedness and risk reduction in vulnerable coastal regions
 
 
Prelims
 
1.Consider the following statements: (UPSC CSE 2020)
1. Jet streams occur in the Northern Hemisphere only.
2. Only some cyclones develop an eye.
3. The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings.
Which of the statements given above is/are correct?
A. 1 Only
B. 2 and 3 Only
C. 2 Only
D. 1 and 3 Only
 
Answer (C)
 
Statement 1: Jet streams occur in the Northern Hemisphere only.
❌ Incorrect.
Jet streams are fast-flowing, narrow air currents found in the upper levels of the atmosphere (tropopause) in both hemispheres — Northern and Southern.
They play a key role in influencing weather patterns and the movement of cyclones globally
Statement 2: Only some cyclones develop an eye.
✅ Correct.
The “eye” forms only in well-developed tropical cyclones when they become strong enough (typically Category 1 or higher).
Weaker systems such as depressions or low-pressure areas do not have a well-defined eye
Statement 3: The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings.
❌ Incorrect.
In reality, the eye is warmer — not cooler — than its surroundings.
This warmth results from subsiding dry air and latent heat release.
The temperature inside the eye is typically 5–10°C higher than the surrounding cloud wall
 
 
 
For Preliminary Examination:  Current events of national and international Significance
 
For Mains Examination: GS III - Enviornment and Ecology
 
Context:
 
The first half of this year saw something significant — for the first time ever, renewable energy eclipsed coal as the world’s leading source of electricity, according to new data from the UK-based energy think tank Ember.
 
 
Read about:
 
What is the status of India’s carbon emission?
 
What are the various sectors of renewable energy in India?
 
 
Key takeaways:
 
 
  • As of June 2025, India’s installed power generation capacity had reached 485 gigawatts (GW). Of this, about 185 GW came from renewable energy sources such as solar, wind, small hydro, and biogas, as per data from the Ministry of New and Renewable Energy (MNRE).
  • In addition, large hydro projects accounted for 49 GW, while nuclear energy contributed 9 GW, pushing the total non-fossil fuel capacity just beyond the 50% mark.
  • The remaining 242 GW, or nearly 49.9%, came from thermal power plants—mainly coal and gas-based—marking a significant decline from 2015, when thermal energy made up nearly 70% of India’s electricity mix.
  • The sharp rise in renewable capacity has begun to show results: carbon dioxide emissions from India’s power sector registered a slight decline in the first half of 2025 compared to the same period the previous year, according to an analysis by the Centre for Research on Energy and Clean Air (CREA), a UK-based think tank.
  • This is the first recorded drop in India’s electricity-related COâ‚‚ emissions, partly due to favorable weather conditions reducing energy demand.
  • Since over half of India’s total emissions stem from coal use for electricity and heat, this sector remains the country’s largest source of carbon output.
  • However, India’s rapid renewable expansion—without corresponding growth in energy storage capacity—has begun to strain the power grid, creating instability.
  • The problem is worsened by a slowdown in thermal power additions, which traditionally provide baseload stability, especially during evening demand peaks when solar generation falls.
  • Recognizing this challenge, the Government of India has started taking corrective policy measures. It is now re-emphasizing thermal and nuclear energy, including plans for small modular reactors, while also accelerating efforts to develop energy storage systems.
  • In February 2025, the Central Electricity Authority (CEA) advised that future solar projects should integrate co-located energy storage to enhance grid reliability.
  • Similarly, the Ministry of Power expanded its Viability Gap Funding (VGF) program for battery storage, adding 30 gigawatt-hours (GWh) to the existing 13 GWh, backed by an allocation of ₹5,400 crore.
  • According to government data up to June 30, 2025, non-fossil fuel sources—including renewables, nuclear, and large hydro—accounted for 50.1% of India’s installed capacity, overtaking thermal power for the first time.
  • This marks a remarkable transition from 30% in 2015 and 38% in 2020, driven largely by the boom in solar and wind power.
  • When India signed the Paris Agreement in 2015, it pledged to achieve 40% non-fossil capacity by 2030, a target later raised to 50% in 2022—a goal that the country has now already met.
  • The Ember 2025 report on global electricity trends highlighted that while coal use declined in both China and India, the drop in India was viewed as temporary, while in China it was described as structural.
  • A separate International Energy Agency (IEA) report predicted that global renewable capacity could more than double by 2030, with solar power accounting for 80% of new additions. It also projected China to remain the largest market for renewables, with India emerging as the second largest.
  • Globally, the first half of 2025 saw solar and wind generation surpassing overall demand growth — electricity demand rose by 2.6%, while solar generation grew by 31% and wind by 7.7%. For the first time in history, renewables overtook coal in global electricity generation, with their share reaching 34.3%, compared to 33.1% for coal.
  • Despite higher global electricity consumption, power sector emissions plateaued in early 2025. Emission reductions in China and India offset increases in Europe and the United States, signaling a potential turning point in the global transition toward cleaner energy systems
 
 
Follow Up Question
 
Mains
 
1.To what factors can the recent dramatic fall in equipment costs and tariff of solar energy be attributed ? What implications does the trend have for the thermal power producers and the related industry ? (UPSC CSE 2015)
 
Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
 

Introduction (30–40 words)

Introduce the context by highlighting the sharp decline in solar energy tariffs and its significance for India’s energy transition

Body

A. Factors Behind the Decline in Solar Costs and Tariffs

  • Technological Improvements:

    • Advances in photovoltaic (PV) cell efficiency and manufacturing automation.

    • Innovations in storage and grid integration reduce lifecycle costs.

  • Global Economies of Scale:

    • Expansion of solar manufacturing, particularly in China, driving down global module prices.

    • Mass production and competition lowered per-unit costs.

  • Policy and Institutional Support:

    • Jawaharlal Nehru National Solar Mission (JNNSM), Renewable Purchase Obligations (RPOs), and Viability Gap Funding (VGF).

    • Transparent bidding mechanisms by SECI ensured price discovery and competitiveness.

  • Falling Financing and Soft Loans:

    • Availability of concessional finance from global institutions (World Bank, ADB, IREDA).

    • Lower risk perception and long-term Power Purchase Agreements (PPAs).

  • Domestic Reforms and Infrastructure Support:

    • Development of solar parks and ease in land acquisition.

    • Decline in balance-of-system and operation & maintenance (O&M) costs.

Conclusion (30–40 words)

The sharp fall in solar energy costs reflects a paradigm shift in the global energy mix. For India, it offers a path toward sustainable growth, though it demands strategic adaptation from the thermal power and coal industries

Introduction 

India has witnessed a sharp decline in solar energy tariffs—from around ₹17 per kWh (2010) to less than ₹3 per kWh (by 2018). This transformation is driven by technological advancements, global competition, and proactive government policies.

Body

(a) Factors behind the Fall in Equipment Costs and Tariffs

  • Technological Advancements:

    • Continuous innovation in photovoltaic (PV) technology improved efficiency and reduced manufacturing costs.

    • Shift from polycrystalline to monocrystalline and thin-film technologies.

  • Economies of Scale:

    • Global expansion of solar production, especially by China, reduced per-unit costs.

    • Larger solar parks and competitive bidding in India (e.g., SECI auctions) drove down tariffs.

  • Government Policies and Incentives:

    • Initiatives like National Solar Mission (2010), Renewable Purchase Obligations (RPOs), and Viability Gap Funding (VGF) encouraged investment.

    • Tax benefits, accelerated depreciation, and soft loans promoted domestic installation.

  • Falling Global Prices of Solar Modules:

    • Overcapacity in global solar manufacturing markets, especially in China and Taiwan, led to cheaper imports.

  • Improved Financing and Investor Confidence:

    • Green bonds, low-cost international finance (World Bank, ADB), and long-term PPAs enhanced project viability.

  • Decline in Balance-of-System Costs:

    • Cheaper inverters, mounting structures, and lower maintenance expenses due to automation.

Implications for Thermal Power Producers and Related Industry

  • Reduced Competitiveness of Thermal Power:

    • Solar energy tariffs became cheaper than new coal-based power.

    • Investors and DISCOMs prefer renewables over thermal projects.

  • Stranded Assets and Financial Stress:

    • Many coal-based plants face low plant load factors (PLFs), underutilization, and mounting NPAs.

  • Shift in Investment Patterns:

    • New investments diverted towards renewables, storage, and green hydrogen.

    • Coal sector witnessing reduced FDI and private interest.

  • Pressure on Coal Mining and Equipment Industries:

    • Lower demand impacts coal production, transportation (Railways), and allied industries like turbine manufacturers.

  • Environmental and Policy Implications:

    • Encourages transition to low-carbon economy.

    • Challenges include managing grid stability, storage solutions, and just transition for coal-dependent regions.

Conclusion 

The fall in solar costs marks a paradigm shift in India’s energy landscape. While it fosters sustainable development, thermal power producers must adapt through diversification, modernization, and adoption of hybrid energy models to remain relevant in a clean-energy future
 
Prelims
 
1.In the context of WHO Air Quality Guidelines, consider the following statements: (UPSC 2022)
1. The 24-hour mean of PM2.5 should not exceed 15 μg/m³ and annual mean of PM2.5 should not exceed 5 μg/m³.
2. In a year, the highest levels of ozone pollution occur during the periods of inclement weather.
3. PM10 can penetrate the lung barrier and enter the bloodstream.
4. Excessive ozone in the air can trigger asthma.
Which of the statements given above are correct?
A. 1, 3 and 4         
B. 1 and 4 only     
C.  2, 3 and 4         
D. 1 and 2 only
 
Answer (A)
 

  • Statement 1 — Correct:
    According to the World Health Organization (WHO) Air Quality Guidelines (2021), the 24-hour mean for PM2.5 should not exceed 15 μg/m³, and the annual mean should not exceed 5 μg/m³.

  • Statement 2 — Incorrect:
    Ozone pollution is highest during periods of strong sunlight and warm weather, not during inclement weather (which usually refers to cloudy or rainy conditions). Hence, this statement is false.

  • Statement 3 — Correct:
    PM10 (particulate matter with a diameter of 10 micrometers or less) can penetrate deep into the lungs. However, smaller particles like PM2.5 can enter the bloodstream, but PM10 can still cross the lung barrier to some extent and cause health issues.

  • Statement 4 — Correct:
    High levels of ozone can cause respiratory irritation and trigger asthma attacks, especially in vulnerable individuals
 
 
 
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