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30-Oct-2025
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INTEGRATED MAINS AND PRELIMS MENTORSHIP (IMPM) KEY (30/10/2025)

INTEGRATED MAINS AND PRELIMS MENTORSHIP (IMPM) 2025 Daily KEY

 
 
 
 
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 Production-Linked Incentive (PLI) scheme and Cyclones  its significance for the UPSC Exam? Why are topics like Indus RIver Conundrum ,  Ethanol blending, Cloud seeding important for both preliminary and main exams? Discover more insights in the UPSC Exam Notes for October 30, 2025
 
 
 

What is China’s complaint against India at WTO?

For preliminary Examination:  Current events of antional and international Significance

For Mains Examination: GS II & III - International relations & Economy

Context:

China has filed a complaint with the World Trade Organization (WTO) against India. It alleges that India is providing subsidies, as part of the Production-Linked Incentive (PLI) scheme, for the development of advanced chemistry cell (ACC) batteries; for boosting the auto sector; and for facilitating the production of Electric Vehicles, in contravention of WTO law.

 

Read about:

World Trade Organization (WTO)

Production-Linked Incentive (PLI) scheme

 

Key takeaways:

 

China has lodged a formal complaint with the World Trade Organization (WTO), alleging that India’s Production-Linked Incentive (PLI) schemes for Advanced Chemistry Cell (ACC) batteries, the automobile sector, and Electric Vehicle (EV) manufacturing violate WTO rules. According to China, these initiatives amount to trade-distorting subsidies that favor domestic production.

Understanding the PLI Scheme

Launched in 2020, the PLI scheme is a key industrial policy initiative aimed at enhancing India’s manufacturing competitiveness. It offers financial incentives based on incremental production and sales in selected strategic sectors. The primary objectives are to strengthen India’s participation in global value chains (GVCs) and integrate Micro, Small, and Medium Enterprises (MSMEs) through backward linkages.

The three PLI schemes challenged by China include:

  • The PLI for ACC batteries, promoting large-scale battery manufacturing.

  • The PLI for the automobile and auto component sector, supporting Advanced Automotive Technology (AAT) products.

  • The PLI for EVs, designed to attract global electric vehicle manufacturers to establish operations in India.

 

China’s Allegations

China contends that these PLI schemes offer financial incentives tied to Domestic Value Addition (DVA), effectively encouraging the use of locally produced inputs over imported ones. For example, the auto sector PLI requires a 50% DVA, while the ACC battery scheme mandates 25% DVA. According to China, these conditions discriminate against imported—particularly Chinese—components and thus contravene WTO norms

 

WTO Rules on Subsidies

While countries retain the sovereign right to grant subsidies for industrial development, the WTO’s Agreement on Subsidies and Countervailing Measures (SCM Agreement) ensures that such measures do not distort international trade.

Under Article 1 of the SCM Agreement, a subsidy is defined as a financial contribution by a government or public entity that confers a benefit and is specific to certain enterprises or industries. The SCM classifies subsidies into three categories:

  • Prohibited subsidies,

  • Actionable subsidies, and

  • Non-actionable subsidies.

Prohibited subsidies include:

  • Export subsidies, which depend on export performance.

  • Import-substitution (IS) subsidies, which require firms to use domestic over imported goods (as per Article 3.1(b) of the SCM Agreement).
    If a government grants incentives conditional on using local inputs instead of imported ones, it qualifies as a prohibited subsidy.

 

Possible Legal Violations

Such Import-Substitution (IS) subsidies may also breach other WTO obligations, namely:

  • The National Treatment Principle under Article III.4 of GATT, which requires that imported goods receive treatment equal to domestic goods; and

  • Article 2.1 of the Trade-Related Investment Measures (TRIMs) Agreement, which prohibits investment conditions that violate national treatment norms.

 
Follow Up Question
 
Mains
 
1.Critically examine the role of the Production-Linked Incentive (PLI) scheme in strengthening India’s manufacturing competitiveness. In light of recent WTO challenges, discuss how India can ensure that such schemes remain compliant with international trade rules. (250 words)
 

 

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

Introduction (40–50 words)

  • Start by contextualizing the issue: mention China’s WTO complaint and the nature of the dispute.

  • Briefly introduce the core tension — Atmanirbhar Bharat (self-reliance) vs. WTO trade rules

Body

A. India’s Rationale Behind the PLI Scheme (60–70 words)

  • Promote domestic manufacturing and reduce import dependence.

  • Integrate India into global value chains (GVCs).

  • Generate employment and attract FDI.

  • Strengthen technology transfer and innovation in key sectors such as EVs, batteries, and electronics.

China’s Allegations at the WTO (40–50 words)

  • India’s PLI incentives are allegedly contingent on Domestic Value Addition (DVA).

  • China claims this discriminates against imported goods, breaching:

    • SCM Agreement (Article 3.1b) – prohibits import substitution subsidies.

    • TRIMs Agreement – bans local content requirements.

    • GATT Article III – national treatment violation.

Conclusion (30–40 words)

  • End with a balanced note emphasizing synergy between self-reliance and global cooperation.

Example Conclusion:
India’s pursuit of self-reliant growth must align with its international trade commitments. By ensuring transparent, innovation-driven incentives and constructive engagement at the WTO, India can uphold both its developmental objectives and its credibility in global trade governance.

Introduction 

China has filed a complaint at the World Trade Organization (WTO) alleging that India’s Production-Linked Incentive (PLI) schemes violate trade norms by providing subsidies contingent on domestic value addition. This dispute highlights a broader policy dilemma — balancing India’s Atmanirbhar Bharat initiative and industrial promotion goals with the WTO’s rules-based trade system, which seeks to prevent unfair competition and protectionism.

Body

1. Objective and Design of the PLI Scheme (60 words)
Introduced in 2020, the PLI scheme aims to boost domestic manufacturing, attract foreign investment, and integrate India into global value chains. It provides financial incentives for incremental sales in strategic sectors such as automobiles, advanced chemistry cell (ACC) batteries, and electronics, thereby strengthening India’s industrial base and reducing import dependence.

2. China’s Allegations and WTO Concerns (60 words)
China argues that India’s PLI schemes link incentives to Domestic Value Addition (DVA) — 50% in the auto sector and 25% in ACC batteries — which discriminates against imported goods. This, it claims, violates provisions of the Subsidies and Countervailing Measures (SCM) Agreement, the Trade-Related Investment Measures (TRIMs) Agreement, and the national treatment clause (Article III) of the GATT.

3. Balancing Industrial Policy and WTO Compliance (80 words)
India’s industrial policy is a legitimate tool for economic self-reliance and job creation, yet WTO rules discourage trade-distorting subsidies. To reconcile both, India can:

  • Redesign incentives around innovation and productivity, not strict local content.

  • Ensure transparency in subsidy notifications to the WTO.

  • Invoke Special and Differential Treatment (SDT) provisions available to developing nations.

  • Build strong legal defence capacity and engage diplomatically to protect its policy space within the WTO framework

Conclusion 

India’s developmental aspirations and global trade responsibilities need not be contradictory. By crafting WTO-compliant, innovation-driven industrial incentives, India can advance its Atmanirbhar Bharat vision while reinforcing its commitment to a fair and rules-based international trading order — ensuring growth with credibility in the global economic system.
 
 
Prelims
 

1.Consider, the following statements : (UPSC 2023)

Statement-I : India accounts for 3.2% of global export of goods.

Statement-II : Many local companies and some foreign companies operating in India have taken advantage of India's ‘Production-linked Incentive’ scheme.

Which one of the following is correct in respect of the above statements?

(a) Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I

(b) Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I

(c) Statement-I is correct but Statement-II is incorrect

(d) Statement-I is incorrect but Statement-II is correct

 

Answer (b)
 
Statement I: India accounts for 3.2% of global export of goods.
✔️ Correct.
According to WTO’s World Trade Statistical Review 2023, India’s share in global merchandise exports was approximately 3.2% in 2022 — a steady rise from around 1.6% a decade earlier.
Statement II: Many local companies and some foreign companies operating in India have taken advantage of India’s Production-Linked Incentive (PLI) scheme.
✔️ Correct.
Under the PLI scheme launched in 2020, both domestic and foreign firms — such as Foxconn, Samsung, Tata, Dixon, and Ola Electric — have benefited by expanding local manufacturing in sectors like electronics, automobiles, and pharmaceuticals
However, the PLI scheme is aimed at boosting domestic manufacturing and investment, not directly responsible for India’s overall 3.2% share in global exports — which is influenced by multiple macroeconomic and trade factors
 
 
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
 
 
 
 

The Indus conundrum: when water is both a lifeline and a faultline

For Preliminary Examination: Current events of national and international Significance

For Mains Examination: GS II - International water treaties

Context:

Is it possible to halt or divert rivers? Rivers are the proverbial natural arteries of ecological systems. They are also worshipped, navigated and dammed. From the ancient ecosystems of Egypt to the sinking cities of Shanghai, rivers are valued differently. No wonder, some of our major river systems are also drying, and ultimately dying. Despite such ambiguity, rivers have remained intertwined with humanity

 

Read about:

Indus Water Treaty

 

Key takeaways:

 

  • The Indus River, one of the longest rivers in Asia and the lifeline of Pakistan, originates in the Tibetan Plateau, near the Mansarovar Lake region close to Mount Kailash. From its source, it flows northwest through the Ladakh region of India, cutting through deep gorges and valleys in the Zaskar and Ladakh ranges.
  • It then enters Pakistan-administered Gilgit-Baltistan, where it is joined by several tributaries such as the Shyok, Gilgit, Zanskar, and Hunza rivers. After traversing the high mountain terrains, the river bends southward near Nanga Parbat — one of the steepest relief zones in the world — and enters the Punjab plains of Pakistan.
  • As the Indus flows further south, it is joined by its major western tributaries — the Jhelum, Chenab, Ravi, Beas, and Sutlej rivers — which collectively form the Indus River System.
  • The river then meanders through the arid region of Sindh, where it sustains agriculture through extensive canal irrigation networks, before finally emptying into the Arabian Sea near Karachi, forming a fertile delta.
  • The significance of the Indus River is both historical and geographical. It was the cradle of the Indus Valley Civilization (c. 2600–1900 BCE), one of the world’s earliest urban civilizations, which flourished along its banks due to the availability of water for agriculture and transportation.
  • Even today, the Indus remains crucial for the economies of both India and Pakistan, supporting millions through agriculture, fisheries, and hydroelectric projects.
  • It also plays a strategic role in the Indus Waters Treaty (1960) between India and Pakistan, which governs the sharing of its tributaries and remains a cornerstone of transboundary water cooperation in South Asia

 

 Indus Waters Treaty (IWT)

 

  • The Indus Waters Treaty (IWT), signed in 1960 between India and Pakistan, is one of the most enduring and successful water-sharing agreements in the world. It was brokered by the World Bank after years of negotiations to resolve water disputes that arose following the partition of British India in 1947.
  • The treaty provides a framework for the equitable sharing and management of the waters of the Indus River System, which comprises six major rivers — the Indus, Jhelum, Chenab, Ravi, Beas, and Sutlej.
  • Under the terms of the treaty, the three eastern rivers — Ravi, Beas, and Sutlej — were allocated to India, while the three western rivers — Indus, Jhelum, and Chenab — were reserved for Pakistan.
  • Although Pakistan was granted the right to use the western rivers extensively, India retained limited rights to utilize their waters for non-consumptive purposes such as hydroelectric generation, irrigation of small areas, and domestic use.
  • This division was designed to ensure that both countries could meet their developmental and agricultural needs while minimizing the scope for direct conflict.
  • To facilitate implementation, the treaty established a Permanent Indus Commission (PIC), consisting of one commissioner from each country. The PIC serves as a regular communication channel for data sharing, inspection of projects, and dispute resolution.
  • In case of disagreements, the treaty provides a three-tiered mechanism — first, bilateral discussions through the commission; second, mediation by a neutral expert appointed by the World Bank; and third, reference to a Court of Arbitration if the dispute remains unresolved.
  • Over the decades, the IWT has survived multiple wars and periods of strained relations, highlighting its resilience and diplomatic importance. However, in recent years, tensions have resurfaced over India’s hydroelectric projects on western rivers — such as the Kishanganga and Ratle — which Pakistan claims violate the treaty’s provisions. India, on the other hand, maintains that these projects are run-of-the-river in nature and fully compliant with the treaty

 

 Follow Up Question

Mains

1.“The Indus Waters Treaty has withstood the test of time, yet it faces new challenges in the context of changing geopolitics and climate realities.”
Examine the significance of the treaty and discuss the emerging concerns in its implementation.
(Answer in 250 words)

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

Introduction (40–50 words)

  • Begin with a brief background — when, why, and between whom the treaty was signed.

  • Mention its reputation as a successful model of transboundary water management.

  • End with a transition toward the “challenges” part of the question

Body (Main Analysis – 150–170 words)

A. Significance of the Treaty

  • Promotes peaceful cooperation between two rival nations since 1960.

  • Provides a clear division of rivers — eastern (India) and western (Pakistan).

  • Established Permanent Indus Commission for regular data exchange and dispute resolution.

  • Enabled agricultural and hydroelectric development in both countries.

  • Serves as a model for conflict resolution and transboundary water governance globally

Emerging Concerns and Challenges

  • Geopolitical Tensions: Growing mistrust over Indian hydropower projects on western rivers like Kishanganga and Ratle.

  • Climate Change: Glacial melt, altered monsoon patterns, and variability in river flow threaten water availability and treaty assumptions.

  • Technological Gaps: Outdated data-sharing mechanisms amid modern hydrological challenges.

  • Demographic and Developmental Pressures: Rising water demand and changing land use patterns.

  • Institutional Rigidity: Limited flexibility to adapt to 21st-century realities.

Conclusion (30–40 words)

  • Conclude by highlighting the need for dialogue and modernization of the treaty.

  • Emphasize cooperation over confrontation

 

Introduction:

The Indus Waters Treaty (IWT), signed in 1960 between India and Pakistan with the mediation of the World Bank, regulates the sharing of the six rivers of the Indus Basin. It has often been cited as one of the most durable transboundary water agreements, enduring wars, political hostility, and decades of mistrust between the two nations. By ensuring predictable water allocation, the treaty has become a cornerstone of hydro-diplomacy in South Asia

Body:

The treaty divides the river system into eastern (Ravi, Beas, Sutlej) and western (Indus, Jhelum, Chenab) rivers, allocating the eastern rivers to India and the western ones to Pakistan, while granting India limited rights over the western rivers for hydropower generation, irrigation, and navigation. The establishment of a Permanent Indus Commission (PIC) enables regular data exchange, inspections, and dispute resolution. This institutional structure has been central to maintaining water cooperation despite strained political ties.

However, the IWT now faces mounting challenges. Geopolitical frictions have intensified over India’s hydropower projects such as Kishanganga and Ratle, which Pakistan alleges violate treaty provisions. Meanwhile, climate change — through glacial retreat, erratic monsoon patterns, and changing river flows — threatens the reliability of water supplies. Additionally, population growth, rising water demand, and the treaty’s inflexibility to adapt to new hydrological and technological realities further test its sustainability

Conclusion:

Despite these challenges, the Indus Waters Treaty remains a symbol of pragmatic cooperation between adversarial states. To preserve its relevance, both nations must modernize its provisions, strengthen institutional mechanisms, and embrace joint basin management that treats water as a shared ecological resource rather than a source of contention
 
 
 
Prelims
 
1.With reference to the Indus river system, of the following four rivers, three of them pour into one of them which joins the Indus directly. Among the following, which one is such a river that joins the Indus direct? (2021)

(a) Chenab

(b) Jhelum

(c) Ravi

(d) Sutle

Answer (b)
 

The Indus River System in India and Pakistan consists of six major rivers — Indus, Jhelum, Chenab, Ravi, Beas, and Sutlej.

Let’s look at their flow pattern:

  • The Jhelum River flows into the Chenab.

  • The Ravi River joins the Chenab.

  • The Beas River merges with the Sutlej, and then the Sutlej joins the Chenab.

Finally, the Chenab River flows westward and joins the Indus River directly near Mithankot in Pakistan

 

Sugar sector concerned over reduction in ethanol sourcing

For Preliminary Examination:  Current events of national and international Significance

For Mains Examination: GS III - Environment and ecology

Context:

The sugar sector is concerned over the cut in ethanol sourcing in the 2025-2026 ethanol supply year.The Indian Sugar & Bio-Energy Manufacturers Association (ISMA) said only 289 crore litre ethanol had been allocated from sugar-based feedstock or 28% of the total need

 

Read about:

What is Ethanol blending?

How does ethanol produced?

 

Key takeaways:

 

  • Ethanol blending refers to the process of mixing ethanol — an alcohol-based biofuel derived primarily from biomass such as sugarcane, corn, or other agricultural feedstocks — with petrol (gasoline) to be used as fuel in vehicles. The goal of ethanol blending is to reduce the consumption of fossil fuels, cut greenhouse gas emissions, and promote renewable energy sources
  • Ethanol (chemical formula: Câ‚‚Hâ‚…OH) is an oxygenate, meaning it contains oxygen, which helps in more complete combustion of fuel, thereby reducing harmful exhaust emissions like carbon monoxide and hydrocarbons. When blended with petrol, it produces a cleaner-burning fuel.

In India, the blending percentage is denoted as E10, E20, etc., where the number represents the percentage of ethanol in petrol.

  • E10: 10% ethanol + 90% petrol

  • E20: 20% ethanol + 80% petrol

 
  • The Government of India launched the Ethanol Blended Petrol (EBP) Programme to promote the use of alternative and environment-friendly fuels. Initially targeting 10% blending (E10), India has now advanced toward 20% blending (E20) by 2025-26 as part of its National Biofuel Policy (2018) and to reduce dependence on imported crude oil

 

Ethanol and Sugarcane

 

  • Ethanol from sugarcane is produced through a biochemical process that converts the sugar content of cane juice or molasses into alcohol by fermentation. It’s one of the most efficient and widely used methods for producing bioethanol, particularly in countries like India and Brazil, where sugarcane is abundantly available
  • The process begins with sugarcane being crushed to extract cane juice.
    Alternatively, molasses (a thick, dark by-product left after sugar crystallization) can be used. Both cane juice and molasses contain sucrose, a fermentable sugar
  • The extracted sugar solution is diluted with water and mixed with yeast (Saccharomyces cerevisiae).
    During fermentation, yeast converts the sugar (sucrose) into ethanol and carbon dioxide

 

Follow Up Question

Mains

1.“Ethanol blending in petrol is not merely an energy policy, but a step towards achieving India’s climate, agricultural, and economic goals.”
Discuss the significance of the Ethanol Blending Programme (EBP) in India and the challenges involved in its implementation.

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

Introduction:

  • Start by defining ethanol blending and its policy context.

  • Mention India’s Ethanol Blending Programme (EBP) and national targets.

Body:

1. Significance of Ethanol Blending:

a) Economic Benefits:

  • Reduces India’s crude oil import bill (India imports ~85% of its crude needs).

  • Saves foreign exchange and enhances energy security.

  • Provides an additional income source to farmers through demand for sugarcane, maize, and other feedstock.

b) Environmental Benefits:

  • Ethanol is a cleaner fuel, reducing carbon monoxide and particulate emissions.

  • Supports India’s commitments under the Paris Agreement and its Net Zero 2070 goal.

c) Agricultural and Rural Impact:

  • Utilises surplus sugarcane and damaged grains for ethanol production, stabilising farm income.

  • Encourages crop diversification and promotes rural industrialisation.

Challenges in Implementation:

a) Feedstock Constraints:

  • Over-dependence on sugarcane leads to stress on water resources, especially in drought-prone regions.

  • Limited supply of alternative feedstocks like maize or cellulosic biomass.

b) Infrastructure and Technological Gaps:

  • Inadequate ethanol production and storage infrastructure.

  • Need for vehicle engine modifications for higher blends (beyond E10).

c) Policy and Pricing Issues:

  • Variation in procurement prices across states.

  • Coordination challenges between Oil Marketing Companies (OMCs), distilleries, and state governments.

d) Environmental Trade-offs:

  • Large-scale sugarcane cultivation leads to groundwater depletion and soil degradation in some regions

Conclusion:

The Ethanol Blending Programme represents a multi-sectoral reform, connecting India’s energy, agriculture, and climate agendas. While significant progress has been made — achieving around 12% blending in 2023 — addressing feedstock diversification, water sustainability, and infrastructure bottlenecks will be crucial to achieving the E20 target sustainably. Ethanol blending thus embodies India’s pursuit of “Atmanirbhar Bharat” through a greener and more resilient energy economy
Introduction:
Ethanol blending refers to mixing ethanol, a biofuel derived mainly from sugarcane and grain-based feedstock, with petrol to produce cleaner fuel. The Government of India launched the Ethanol Blending Programme (EBP) to reduce import dependency, lower emissions, and support farmers. The country has advanced its target of 20% blending (E20) from 2030 to 2025-26
 

Body:

Significance:
Ethanol blending offers multiple benefits. Economically, it reduces India’s crude oil import bill and saves valuable foreign exchange. For farmers, it creates a stable market for surplus sugarcane and maize, boosting rural income and supporting Atmanirbhar Bharat. Environmentally, ethanol combustion emits fewer pollutants, helping India meet its Paris Agreement commitments and Net Zero 2070 goals.

The policy also promotes energy diversification and rural industrialisation through new distilleries and biofuel units.

Challenges:
However, implementation faces hurdles. Over-reliance on sugarcane feedstock strains water resources. Infrastructure gaps, such as limited ethanol storage and blending facilities, hinder expansion. Technological adaptation for higher blends and price volatility remain issues. Additionally, large-scale sugarcane cultivation can cause environmental stress in water-scarce areas

Conclusion:
The Ethanol Blending Programme is a transformative initiative linking India’s energy security, climate action, and agricultural sustainability. Overcoming feedstock and infrastructural challenges through diversification and innovation will be crucial to achieving a cleaner and self-reliant fuel future

 

Prelims 

 1.According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels? (UPSC 2020)

1. Cassava
2. Damaged wheat grains
3. Groundnut seeds
4. Horse gram
5. Rotten potatoes
6. Sugar beet
Select the correct answer using the code given below:
A. 1, 2, 5, and 6 only
B. 1, 3, 4, and 6 only
C. 2, 3, 4, and 5 only
D. 1, 2, 3, 4, 5 and 6
 
Answer (A)
 

According to India’s National Policy on Biofuels (2018) —
Biofuels can be produced from various biomass sources such as:

  • Sugar-based crops (e.g., sugarcane, sugar beet, sweet sorghum)

  • Starch-based crops (e.g., corn, cassava, rotten potatoes, damaged food grains like wheat and maize)

  • Oil-based feedstock (non-edible oil seeds, used cooking oil, animal fats)

Let me analyze each option from the question:

  1. Cassava - ✓ Allowed (starch-containing material)
  2. Damaged wheat grains - ✓ Allowed (damaged food grains unfit for human consumption)
  3. Groundnut seeds - ✗ Not mentioned in the policy for biofuel production
  4. Horse gram - ✗ Not mentioned in the policy for biofuel production
  5. Rotten potatoes - ✓ Allowed (damaged food grains/starch materials unfit for human consumption)
  6. Sugar beet - ✓ Allowed (sugar-containing material)
 
 
 
For Preliminary Examination:  Current events of national and international Significance like Cloud Seeding
 
For Mains Examination: GS III - Science and Technology
 
Context:
 
Nearly 50 years after the last such recorded attempt, Delhi witnessed an artificial rain experiment on Tuesday to tackle surging air pollution levels. With the Capital reeling under an Air Quality Index of 294 (poor), two cloud-seeding trials were held at 12.13 pm and 3.45 pm.
 
 
Read about:
 
What is cloud seeding?
 
What are the challenges associated with cloud seeding?
 
 
Key takeaways:
 
 
  • Cloud seeding is a form of weather modification technology used to induce artificial rainfall. However, its success depends on the presence of sufficient clouds in the atmosphere.
  • Normally, rainfall occurs when moisture in the air becomes saturated and condenses into droplets. Cloud seeding accelerates this natural process by dispersing chemical particles—known as condensation nuclei—such as silver iodide or sodium chloride, which help water vapor condense more easily into raindrops.
  • In a recent experiment carried out jointly by the Delhi government and IIT-Kanpur, and approved by the India Meteorological Department (IMD), no measurable rainfall was observed over Delhi, although light showers of about 0.1 to 0.2 mm were recorded in Noida and Greater Noida. These results were confirmed using data from the weather website windy.com.
  • The test run, conducted on October 23, involved a Cessna 206H aircraft that began its operation from the IIT-Kanpur airstrip, passing over areas such as Meerut, Khekra, Burari, Sadakpur, Bhojpur, and Aligarh. During a 17–18-minute seeding phase, the aircraft released flares weighing approximately 0.5 kg, which burned for 2–2.5 minutes and emitted silver iodide and sodium chloride into the clouds.
  • Environmental experts have, however, cautioned that such trials offer only a temporary respite from pollution and do not tackle the underlying causes of poor air quality in the region
 
Follow Up Question
 
Mains
 
1.“Cloud seeding is often seen as a technological fix to mitigate pollution and water scarcity, yet it raises questions about efficacy, sustainability, and environmental ethics.”
Critically examine the potential and limitations of cloud seeding as a weather modification technique in the Indian context.
 
Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only

Introduction (40–50 words)

Start with a concise definition and contextual linkage. You can begin with a general statement about human attempts to control weather, or cite a recent Indian example like the Delhi–IIT Kanpur cloud seeding trial.

Body (150–170 words)

A. Potential and Advantages

  • Rainfall Augmentation: Can increase precipitation in arid regions like Maharashtra or Rajasthan, supporting agriculture and groundwater recharge.

  • Pollution Mitigation: Artificial rain helps settle particulate matter, offering short-term relief during high AQI episodes (e.g., Delhi).

  • Water Security and Drought Management: Enhances reservoir levels and rural livelihoods.

  • Technological Advancements: Collaboration with institutes like IIT-Kanpur shows India’s growing capacity for atmospheric experimentation.

Limitations and Concerns

  • Uncertain Effectiveness: Success depends heavily on cloud type, humidity, and temperature — making outcomes unpredictable.

  • Environmental Risks: Chemical residues like silver iodide could potentially impact soil and water ecosystems.

  • Ethical and Geopolitical Issues: Manipulating weather could raise questions of cross-border impacts or equity of rainfall distribution.

  • Policy & Governance Gap: Absence of a comprehensive national framework or legal guidelines for weather modification in India.

  • Short-term Fix: Addresses symptoms (pollution or drought) rather than structural causes (industrial emissions, poor water management)

Conclusion (40–50 words)

Sum up by taking a balanced stance: cloud seeding is an emerging technology with limited but situational utility. Stress the need for scientific validation, regulatory safeguards, and integration into broader climate policy
Introduction:
Cloud seeding is a weather modification technique aimed at inducing artificial rainfall by dispersing substances such as silver iodide or sodium chloride into moisture-laden clouds to accelerate condensation. In India, recent trials—such as those conducted by the Delhi government and IIT-Kanpur—have reignited debates on its role in tackling air pollution and drought
 

Body:

Potential and Benefits:
Cloud seeding offers a short-term solution to reduce air pollution by washing out suspended particulates and can help augment rainfall in drought-prone areas. It holds promise for water resource management, agriculture, and urban air quality improvement, especially in arid regions like Rajasthan and Maharashtra. Several countries, including the United States, China, and the UAE, have used it with varying degrees of success.

Limitations and Concerns:
However, its effectiveness remains uncertain, as results depend on atmospheric conditions and the availability of suitable clouds. Trials in India, including in Delhi and Maharashtra, have shown inconsistent outcomes. Moreover, cloud seeding is a temporary and localized measure that does not address the root causes of air pollution. Environmentalists also raise concerns about chemical impacts on ecosystems and ethical questions regarding weather manipulation

Conclusion:
While cloud seeding can serve as an emergency intervention, it is not a sustainable or comprehensive solution to India’s environmental challenges. Long-term strategies focused on pollution control, afforestation, and sustainable water management are essential to complement such technological experiments
 
 
Prelims
 

1.In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of sulphate aerosol into stratosphere? (UPSC CSE 2019)

(a) Creating the artificial rains in some regions
(b) Reducing the frequency and intensity of tropical cyclones
(c) Reducing the adverse effects of solar wind on the Earth
(d) Reducing the global warming

Answer (d)
 
Both cirrus cloud thinning and sulphate aerosol injection are geoengineering techniques — deliberate interventions in the Earth’s climate system — proposed to counteract global warming caused by greenhouse gas emissions.

Cirrus Cloud Thinning Technique

  • Cirrus clouds, found high in the troposphere, trap outgoing infrared radiation, contributing to warming.

  • Scientists propose thinning or reducing these clouds to allow more heat to escape into space, thereby cooling the planet.

  • This method aims to alter the cloud microphysics using aerosols or ice nuclei to reduce cloud optical thickness and lifetime

Sulphate Aerosol Injection into the Stratosphere

  • Inspired by natural volcanic eruptions (like Mount Pinatubo, 1991) that caused temporary global cooling.

  • The idea is to inject sulphate aerosols (like SOâ‚‚) into the stratosphere, where they reflect a portion of incoming solar radiation back into space.

  • This mimics a “global sunscreen” effect, temporarily reducing Earth’s temperature
 
 
 

Subject Wise Topics

Topic Description
1. Fundamental Rights (Polity) https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=3
2. Doctrine of Lapse (Modern Indian History) https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=386
3. Monetary Policy (Economy) https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=182
4. Environment Pollution (Environmnet and Ecology) https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=158
5. Physical features of India https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=572

 

 

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