INTEGRATED MAINS AND PRELIMS MENTORSHIP (IMPM) 2025 Daily KEY
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Foreign Direct Investment (FDI) and Coronal Mass Ejection (CME) its significance for the UPSC Exam? Why are topics like Carbon Border Adjustment Mechanism (CBAM), India–Middle East–Europe Economic Corridor (IMEC) important for both preliminary and main exams? Discover more insights in the UPSC Exam Notes for October 28, 2025 |
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)
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Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
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Prelims
- Carbon dioxide
- Carbon monoxide
- Nitrogen dioxide
- Sulfur dioxide
- 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
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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:
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What is Google’s ‘quantum advantage’ leap?
For Preliminary Examination: Current events of national and international Significance
For Mains Examination: GS III - Science and technology
Context:
In two papers published in Nature on October 22, researchers from Google, MIT, Stanford, and Caltech reported what they called a verifiable display of quantum advantage using the company’s Willow quantum processor. That is, the teams said they have shown that Willow clearly outperforms existing supercomputers on solving a specific problem
Read about:
What is quantum advantage?
Decoded Quantum Interferometry (DQI)
Key takeaways:
How does a quantum computer work?
- Think of ripples spreading across a pond: when two wave crests meet, they combine to form a larger wave, but when a crest meets a trough, they cancel each other out. This phenomenon, known as interference, is key to quantum computing.
- At the quantum scale, particles exhibit wave-like behavior, and their wave functions—which describe the probabilities of different outcomes—can be controlled to interfere constructively or destructively.
- By managing these interferences, scientists enhance the likelihood of obtaining the correct solution while suppressing incorrect ones. This is the fundamental operating principle of a quantum computer.
- In one study, researchers created a quantum algorithm to handle optimization problems, where the aim is to identify the best outcome among many options. They called this method Decoded Quantum Interferometry (DQI).
- It uses a quantum version of the Fourier transform to manipulate the wave-like behavior of particles acting as quantum bits (qubits). In DQI, waves representing good solutions strengthen one another through constructive interference, while those representing poor solutions cancel out.
- When measured, the quantum system is thus more likely to reveal a high-quality solution. The algorithm efficiently solved the optimal polynomial intersection problem, outperforming classical computers
What is scrambling?
- The second study examined how information disperses—or gets “scrambled”—in complex quantum systems. Imagine adding a drop of blue dye into a clear swimming pool.
- Initially, the dye is localized, but as it spreads, the color becomes faint and uniform throughout the pool. The information about the dye’s exact position is no longer visible, yet it’s not lost—it’s simply distributed across every water molecule.
- Similarly, in a quantum system, information initially contained in a single qubit spreads across all interacting qubits, becoming hidden within their intricate relationships.
- To measure this scrambling, scientists designed an experiment resembling echoes in a warehouse. When someone shouts, the sound waves bounce off every surface, dispersing information.
- A moment later, striking a bell alters part of the echo, imprinting it with a distinct tone. When the experiment is “rewound,” normal echoes cancel out, but those with the bell’s imprint remain as faint, distorted sounds.
- This residual echo, called the Out-of-Time-Order Correlator (OTOC), reveals how widely the original information has spread within the system. By studying these subtle signals, researchers can quantify how quantum information mixes and evolves
How do you demonstrate quantum advantage?
- In another experiment, scientists used highly complex quantum circuits that would have taken a top supercomputer over three years to simulate, but the Willow quantum processor completed them in about two hours.
- This highlights quantum advantage—where a quantum computer outperforms the fastest classical systems.
- However, researchers have not yet proved mathematically that no classical shortcut could solve these problems equally fast. Further work is needed to confirm that such challenges are inherently difficult for non-quantum computers.
- While these studies show impressive progress, their tasks remain laboratory demonstrations rather than practical applications.
- Real-world breakthroughs in fields like physics or chemistry will require advances in error correction, scalability, and the development of thousands of stable qubits—an achievement still several years away
(250 words)
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Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
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A. Cloud Services
B. Quantum Computing
C. Visible Light Communication Technologies
D. Wireless Communication Technologies
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Answer (B)
Other options (Incorrect):
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What has the U.S. clarified on H-1B visas?
For Preliminary Examination: Current events of national and international Significance
For Mains Examination: GS II - International Relations
Context:
In a softening of stricter immigration controls announced this September, the U.S. Citizenship and Immigration Services (USCIS) clarified on October 20 that current holders seeking an extension or wanting to switch their visa category would not have to pay the $1,00,000 fee to process H-1B applications
Read about:
What is H-1B visa?
H1-B Visa and Indians
Key takeaways:
- The H-1B visa is a non-immigrant visa issued by the United States government that allows foreign professionals to work temporarily in the country in specialty occupations requiring theoretical or technical expertise. These occupations typically include fields such as information technology, engineering, medicine, finance, architecture, and scientific research.
- To obtain an H-1B visa, a U.S.-based employer must first sponsor the foreign worker and file a petition (Form I-129) with the U.S. Citizenship and Immigration Services (USCIS). The worker must possess at least a bachelor’s degree or its equivalent in a field related to the job.
- Once approved, the visa allows the individual to live and work in the United States for an initial period of three years, which can be extended up to a maximum of six years, depending on the circumstances, such as ongoing employment or pending permanent residency applications.
- Each year, the U.S. government caps the number of new H-1B visas issued at 85,000, with 65,000 visas available under the general quota and an additional 20,000 reserved for individuals who hold advanced degrees (master’s or higher) from U.S. universities.
- The H-1B program plays a crucial role in supporting the U.S. technology and innovation sectors, particularly by allowing American companies to recruit highly skilled workers from countries like India and China, which supply a large portion of H-1B professionals.
- However, the program has also faced criticism for allegedly contributing to job displacement of American workers, wage suppression, and outsourcing of U.S. jobs. These concerns have led to periodic calls for reform to ensure that the visa system truly serves its purpose of attracting top global talent while protecting domestic labor interests
Additional Information
- The H-1B visa holds special significance for India and Indian professionals, as they constitute the largest group of recipients of this U.S. work visa. It serves as a major pathway for skilled Indian workers—especially in the information technology (IT) and engineering sectors—to work and live in the United States, contributing significantly to both countries’ economies.
- For decades, Indian IT professionals employed by multinational firms such as Infosys, TCS, Wipro, and HCL Technologies have been among the top beneficiaries of the H-1B visa program.
- These companies often send employees on short- to medium-term projects to their U.S. client locations, enabling technology transfer and service delivery in areas such as software development, consulting, and data analytics.
- The visa has thus become a critical tool in sustaining India’s IT export economy, which depends heavily on its access to global markets.
- According to U.S. immigration data, Indians have accounted for roughly 60–75% of all H-1B visas issued annually in recent years. Many Indian professionals also use the H-1B visa as a pathway to permanent residency (Green Card), leading to the formation of a large and influential Indian diaspora in the U.S. technology and research sectors.
- However, the program has faced challenges, including stricter visa scrutiny, rising rejection rates, and increased competition under changing U.S. immigration policies. Concerns over outsourcing and wage disparity have occasionally led to political pushback in the United States
Follow Up Question
Mains
1.The H-1B visa programme has become both an opportunity and a challenge for India–US relations.” Examine the significance of the H-1B visa for India’s skilled workforce and analyse its broader implications for India–US economic and diplomatic ties.
(250 words)
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Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
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Prelims
1.With reference to the H-1B visa, consider the following statements:
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It is a U.S. visa category that allows foreign workers to be employed temporarily in specialty occupations requiring theoretical or technical expertise.
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The H-1B visa is issued for a maximum period of ten years, without any renewal option.
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A large proportion of H-1B visa holders are professionals from India, particularly in the information technology sector.
Which of the statements given above is/are correct?
(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
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Answer (b)
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— The Association of Southeast Asian Nations (ASEAN) forms the cornerstone of India’s Act East Policy, which aims to strengthen ties with countries in the broader Asia-Pacific region.
— India is a member of the ASEAN Plus Six framework, which also includes China, Japan, South Korea, Australia, and New Zealand.
— India’s formal partnership with ASEAN began in the early 1990s, and annual summits between the two sides have been held since 2002. This partnership deepened further in 2010, when the India–ASEAN Free Trade Agreement (FTA) came into effect, enhancing economic cooperation and regional connectivity
Significance of ASEAN for India
Strategic and Geopolitical Significance
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Central to India’s Act East Policy: ASEAN is at the core of India’s Act East Policy, which aims to enhance engagement with the Asia-Pacific region through connectivity, commerce, and culture.
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Indo-Pacific Vision: ASEAN’s location makes it crucial for India’s Indo-Pacific strategy, ensuring a free, open, and rules-based maritime order.
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Balancing China’s Influence: Strengthening ties with ASEAN helps India balance China’s growing dominance in Southeast Asia and maintain regional stability
Economic Importance
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Trade and Investment: ASEAN collectively forms one of India’s largest trading partners. The India–ASEAN Free Trade Agreement (FTA), implemented in 2010, has boosted trade in goods and services.
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Market Access: ASEAN’s growing consumer markets offer vast opportunities for Indian exports, investments, and technology collaboration.
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Supply Chain Integration: Closer ties help India integrate into regional value chains, enhancing manufacturing and industrial competitiveness
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Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
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Answer (B)
Hence, India is a member only of the East Asia Summit |
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 |