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GS Paper: GS3

  • India Among Four Nations Driving Global Pesticide Toxicity

    Why in the News

    A new study published in Science finds that India is among four countries contributing nearly 70 percent of the world’s Total Applied Toxicity (TAT) from agricultural pesticides. Experts have also raised concerns that the proposed Pesticides Management Bill 2025 may weaken safeguards compared to the older law.

    What is Total Applied Toxicity (TAT)?

    • TAT measures not just the quantity of pesticides used, but their toxicity and lethality to non target species.
    • Researchers analysed over 600 pesticides across 65 countries from 2013 to 2019.
    • Global TAT has increased, especially for around 20 commonly used agricultural pesticides.

    Countries Driving Global TAT

    • Four major contributors: China, Brazil, United States, and India
    • Together, they account for nearly 70 percent of global pesticide toxicity.
    • Only Chile is currently on track to meet the UN target of reducing pesticide risk by 50 percent by 2030.

    Impact on Biodiversity

    Species most affected:

    1. Terrestrial arthropods
    2. Soil organisms
    3. Fish
    4. Pollinators
    5. Aquatic plants
    6. Terrestrial vertebrates

    Regions with high increases include sub Saharan Africa and parts of the Indian subcontinent.

    Link to Global Commitments

    • At the 2022 United Nations Biodiversity Conference, countries committed to reducing pesticide risk by 50 percent by 2030. The findings indicate that global progress is not on track.

    Indian Legal Framework

    1. Insecticides Act 1968

    • Focused mainly on agricultural use
    • Limited regulation of domestic and non agricultural applications
    • Considered outdated
    • India reportedly uses several pesticides that are banned in parts of Europe, such as paraquat.

    2. Pesticides Management Bill 2025

    • Proposed to replace the 1968 Act
    • Aims to reduce risk to people and environment
    • Encourages biological and traditional knowledge based alternatives
    • Experts warn that without stronger liability and monitoring provisions, it may not significantly improve regulation
    [2019] In India, the use of carbofuran, methyl parathion, phorate and triazophos is viewed with apprehension. These chemicals are used as: 

    (a) pesticides in agriculture 

    (b) preservatives in processed foods 

    (c) fruit-ripening agents 

    (d) moisturising agents in cosmetics

  • India Releases First Anti Terror Policy PRAHAAR

    Why in the News

    The Ministry of Home Affairs on February 23, 2026 released India’s first comprehensive anti terror policy titled PRAHAAR, outlining a national counter terrorism strategy addressing conventional and emerging threats including cyber attacks and drone based terror.

    What is PRAHAAR?

    • PRAHAAR is India’s first formal National Counter Terrorism Policy and Strategy.
    • It provides a unified framework to:
      • Counter cross border sponsored terrorism
      • Address cyber terror and digital radicalisation
      • Protect critical infrastructure
      • Strengthen coordination between Centre and States
      • Enhance prosecution and legal preparedness

    Nature of Threat Identified

    • Cross Border Terror

        • Sponsored terrorism from across the border
        • Activities by global terror groups like Al Qaeda and Islamic State
        • Use of sleeper cells

    • Emerging Technological Threats

        • Criminal hackers and hostile nation states
        • Cyber attacks on critical sectors
        • Use of encryption, dark web, crypto wallets
        • Drones and robotics for terror activities

    • CBRNED Risks

      • Threat of misuse of Chemical, Biological, Radiological, Nuclear, Explosive and Digital materials.

    Critical Sectors Identified

    • Protection strengthened in: Power, Railways, Aviation, Ports, Defence, Space, and Atomic energy
    [2023] Consider the following statements: 1. According to the Constitution of India, the Central Government has a duty to protect States from internal disturbances. 

    2. The Constitution of India exempts the States from providing legal counsel to person being held for preventive detention. 

    3. According to the Prevention of Terrorism Act, 2002, confession of the accused before the police cannot be used as evidence. 

    How many of the above statements are correct? 

    (a) Only one (b) Only two (c) All three (d) None

  • AI and the brain: similar in scale, different in design

    Why in the News?

    GPT-4 introduced a new design that activates only selected parts of its system for specific tasks, similar to how the human brain works. At the same time, AI models are now approaching the brain in scale but consume far more energy. This contrast between similar size and very different efficiency has made the AI-brain comparison a major policy and technological issue.

    How does the scale convergence between AI models and the human brain raise governance and infrastructure challenges?

    1. Parameter Expansion: GPT-3 contains 175 billion parameters; newer models approach trillions, nearing the brain’s ~100 trillion synapses. Scale increases computational dependency and infrastructure concentration.
    2. Data Centre Energy Demand: Training and operating large AI models require megawatts of electricity. Ensures rising carbon footprint and grid stress.
    3. Hardware Dependence: AI training relies on high-performance GPUs originally developed for video gaming. Strengthens semiconductor concentration risks.
    4. Digital Infrastructure Concentration: Massive parallel computation requires clustered data centres. Facilitates market dominance by few global technology firms.
    5. Strategic Autonomy Concern: Nations lacking advanced chip fabrication capacity face technological dependence. Impacts India’s semiconductor mission and AI self-reliance goals.

    In what ways does mixture-of-experts architecture influence regulatory and accountability frameworks?

    Mixture-of-Experts (MoE) is a type of Artificial Intelligence model design where: instead of using the entire neural network for every task and the system activates only a few specialised parts (“experts”) for each input.

    1. Selective Activation: GPT-4 activates specialised network portions for specific tasks. Enhances computational efficiency but complicates traceability
    2. Modular Processing: Resembles the brain’s region-specific activation (language, vision, movement). Raises issues of explainability in AI outputs.
    3. Sparse Routing Mechanism: Routes input through selected pathways rather than full network. Challenges transparency audits.
    4. Task-Based Resource Allocation: Adjusts computational effort based on difficulty. Requires regulatory standards for algorithmic accountability.
    5. Governance Implication: Fragmented internal processing complicates liability assignment in AI-generated harms.

    Why does energy efficiency disparity between AI and the human brain matter for sustainability policy?

    1. Metabolic Efficiency: Human brain operates at ~20 watts of power. Demonstrates biological optimisation.
    2. Event-Driven Signalling: Biological neurons activate selectively and sparsely. Conserves energy.
    3. Digital Arithmetic Dependence: AI systems perform continuous high-precision computation. Increases electricity consumption.
    4. Carbon Footprint Risk: Large-scale AI training elevates emissions through energy-intensive data centres.
    5. Green AI Imperative: Necessitates energy-efficient chip design, including neuromorphic hardware and spike-like operations.

    How do differences in feedback mechanisms and learning processes impact ethical and institutional oversight?

    1. Deep Feedback Loops: Brain processes signals forward, backward, and laterally. Enables contextual interpretation.
    2. Contextual Meaning Formation: Human cognition integrates prior knowledge. Reduces rigid output behaviour.
    3. Feed-Forward Architecture: Most LLMs rely on stacked layers without true recurrence. Limits adaptive contextual reasoning.
    4. Statistical Learning Model: AI identifies probabilistic patterns from text corpora. Does not “understand” meaning intrinsically.
    5. Regulatory Concern: Absence of embodied cognition raises risks of hallucinations, misinformation, and biased outputs.

    What are the implications of AI’s divergence from biological intelligence for public policy and strategic planning?

    1. Non-Biological Scaling: Machines are not constrained by evolutionary limits. Enables rapid parameter expansion.
    2. Super-Computational Potential: AI may surpass humans in speed and pattern recognition.
    3. Efficiency Trade-off: AI sacrifices energy efficiency for computational speed.
    4. Neuromorphic Research: Attempts to mimic spike-based operations to reduce power usage.
    5. Policy Imperative: Requires anticipatory regulation balancing innovation and risk mitigation.

    How does AI’s hardware dependency influence economic concentration and digital sovereignty?

    1. GPU Dominance: AI training dependent on limited global chip manufacturers.
    2. Capital Intensity: High infrastructure cost restricts entry to large corporations.
    3. Data Concentration: Models trained on massive datasets inaccessible to smaller players.
    4. Regulatory Challenge: Ensures competition law scrutiny in AI markets.
    5. National Security Dimension: AI capability linked to defence, cyber security, and economic competitiveness.

    Conclusion 

    AI is approaching the human brain in scale but remains fundamentally different in design and efficiency. While the brain operates with minimal energy and deep contextual feedback, AI depends on massive computation and data infrastructure.

    The key policy challenge lies in balancing innovation with sustainability, accountability, and digital sovereignty. Future AI development must focus not just on scale, but on efficiency, transparency, and alignment with human values.

    PYQ Relevance

    [UPSC 2023] Introduce the concept of Artificial Intelligence (AI). How does AI help clinical diagnosis? Do you perceive any threat to privacy of the individual in the use of AI in healthcare?

    Linkage: Directly linked to GS-3 (Science & Technology) under AI applications and data governance, and GS-4 (Ethics) regarding privacy, accountability, and algorithmic decision-making. The AI-brain debate strengthens this theme by highlighting efficiency, bias, and regulatory concerns in healthcare systems.

  • Why Does Wildfire Smoke Swirl Only One Way?

    Why in the News

    Two recent studies published in Weather and Climate Dynamics and presented at the American Meteorological Society meeting explain why wildfire smoke in the stratosphere forms spinning bubbles that rotate in only one direction depending on the hemisphere.

    What Is Observed?

    • After intense wildfires, smoke can rise high into the stratosphere. Instead of dispersing immediately, it sometimes forms a compact spinning bubble called a smoke vortex.
      • Clockwise in the Northern Hemisphere
      • Counterclockwise in the Southern Hemisphere

    Why Does It Rotate Only One Way?

    • Smoke Heats the Surrounding Air: Smoke particles absorb sunlight. This warms the air around them. Warm air becomes buoyant and rises. This upward movement creates a vertical column of heated air.
    • Earth’s Rotation Effect: Because Earth rotates, moving air experiences a deflection known as the Coriolis effect. 
      • In the Northern Hemisphere, air is deflected to the right. In the Southern Hemisphere, air is deflected to the left. As the heated smoke rises, Earth’s rotation causes it to spin in a preferred direction.

    Why the Bubble Persists

    • The rotating vortex traps warm smoke near its centre. Reduces mixing with surrounding air.
    • Helps the bubble rise higher into the stratosphere. This mechanism is similar to how cyclones maintain structure, but on a smaller and smoke driven scale.
    [2024] With reference to “Coriolis force,” which of the following statements is/are correct? 1. It increases with increase in wind velocity. 

    2. It is maximum at the poles and is absent at the equator. 

    Select the answer using the code given below: 

    (a) 1 only  (b) 2 only  (c) Both 1 and 2  (d) Neither 1 nor 2

  • Proteins Tweaked as Quantum Sensors Inside the Body

    Why in the News

    Two recent studies published in Nature in February 2026 have demonstrated that fluorescent proteins can be genetically engineered to function as quantum sensors inside living cells, detecting magnetic fields and radio waves.

    Background

    • The discovery of Green Fluorescent Protein revolutionised biology by allowing scientists to visualise cellular processes. This breakthrough was recognised with the Nobel Prize in Chemistry in 2008.
    • Now, researchers have shown that such proteins can be modified to detect quantum level signals inside cells.

    Core Scientific Principle

    When a fluorescent protein absorbs light:

    1. An electron moves to a higher energy state.
    2. It usually returns, emitting light.
    3. In some cases, a radical pair forms with unpaired electrons.
    4. Their spin states are influenced by weak magnetic fields.
    5. Changes in spin alter fluorescence intensity.

    This is known as optically detected magnetic resonance, a quantum phenomenon.

    Key Research Findings

    1. Enhanced Yellow Fluorescent Protein

    • Exhibits a metastable triplet state
    • Spin state controlled using laser pulses and microwaves
    • Demonstrated qubit like behaviour inside cells
    • Observed in human kidney cells and in Escherichia coli at room temperature

    2. MagLOV Proteins

    • Engineered from plant light sensing proteins
    • Magneto sensitive fluorescent variants
    • Show stable magnetic resonance inside living bacterial cells
    • Genetically encodable and biologically compatible
    [2022] Which one of the following is the context in which the term “qubit” is mentioned? (a) Cloud Services 

    (b) Quantum Computing 

    (c) Visible Light Communication Technologies 

    (d) Wireless Communication Technologies

  • Textile Mills Closure in Tamil Nadu 

    Why in the news? 

    As per the Annual Survey of Industries data released by the Union Ministry of Textiles, over 300 textile mills in Tamil Nadu went out of operation between 2021 to 22 and 2023 to 24.

    Key Data

    • 2021 to 22
      • Total mills: 2,773
      • Operational: 2,121
    • 2023 to 24
      • Total mills: 2,455
      • Operational: 1,672
    • Nearly 2 lakh powerlooms reportedly shut in the last few years.
    • Majority units fall under MSME segment.

    Major Reasons for Closures

    • High Power Cost

      • Electricity tariff around ₹9.25 per unit
      • Higher than competing States
      • Units with wind and solar investments survived relatively better

    • Raw Material Issues

      • Cotton, polyester, viscose sourced largely from northern India
      • High transportation cost
      • Earlier import duty on cotton impacted mills
      • Quality Control Orders created compliance burden

    • Environmental Compliance

      • Mandatory Zero Liquid Discharge norms for processing units
      • Higher compliance cost compared to States permitting marine discharge

    • Financial Stress

      • Higher bank interest rates
      • Limited subsidy coverage
      • MSMEs more vulnerable
    [2010] Tamil Nadu is a leading producer of mill-made cotton yarn in the country. What could be the reason? 1. Black cotton soil is the predominant type of soil in the State. 

    2. Rich pool of skilled labour is available. 

    Which of the above is/are the correct reasons? 

    (a) 1 only  (b) 2 only  (c) Both 1 and 2  (d) Neither 1 nor 2

  • Enforcement Directorate Flags 8 Priority Areas for 2026

    Why in the news?

    The Enforcement Directorate identified eight priority focus areas during its 34th quarterly zonal conference held in Guwahati from February 19 to 21, 2026. The meeting was chaired by ED Director Rahul Navin.

    8 Priority Focus Areas

    1. Tracing foreign assets parked abroad, especially in Dubai and Singapore
    2. Misuse of Insolvency and Bankruptcy Code and collusion in resolution processes
    3. Trade Based Money Laundering (TBML) through over and under invoicing
    4. Cyber fraud including digital arrest scams
    5. Illegal online gambling and betting networks
    6. Drug trafficking finance and hawala channels
    7. Share market manipulation linked money laundering
    8. Foreign interference through illicit funding

    Legal and Institutional Framework

    • Prevention of Money Laundering Act, 2002: Primary legislation empowering ED to investigate money laundering and attach proceeds of crime.
    • Insolvency and Bankruptcy Code, 2016:Possible misuse through collusion among corporate debtors, resolution professionals, and Committee of Creditors.

    Foreign Exchange Laws

    • Review of pending cases under
    • Foreign Exchange Regulation Act
    • Foreign Exchange Management Act
    • Target: Complete adjudication of all pending FERA cases by March 31, 2026.

    International Cooperation Mechanisms

    ED emphasized stronger global coordination through:

    • Interpol via Bharatpol portal
    • Egmont Group for financial intelligence exchange
    • Asset Recovery Interagency Network Asia Pacific
    • GlobE Network

    Intelligence Platforms Used

    • NATGRID
    • FINNET
    • Financial Intelligence Unit India
    • Indian Cyber Crime Coordination Centre
    • Narcotics Control Bureau
    [2019] Consider the following statements: 1. The United Nations Convention against Corruption (UNCAC) has a ‘Protocol against the Smuggling of Migrants by Land, Sea and Air’. 

    2. The UNCAC is the ever-first legally binding global anti-corruption instrument. 

    3. A highlight of the United Nations Convention against Transnational Organized Crime (UNTOC) is the inclusion of a specific chapter aimed at returning assets to their rightful owners from whom they had been taken illicitly. 

    4. The United Nations Office on Drugs and Crime (UNODC) is mandated by its member States to assist in the implementation of both UNCAC and UNTOC. 

    Which of the statements given above are correct? 

    (a) 1 and 3 only (b) 2, 3 and 4 only (c) 2 and 4 only (d) 1, 2, 3 and 4

  • AI’s workhorse: What is a GPU? How does it work?

    Why in the News?

    European regulators are examining Nvidia’s dominance in AI GPUs amid concerns of anti-competitive practices and software lock-in through CUDA. The NVIDIA CUDA ecosystem is a comprehensive, proprietary parallel computing platform and programming model that enables GPUs to perform general-purpose computing (GPGPU). Nvidia holds nearly 90% of the discrete AI GPU market, creating high entry barriers. AI training workloads rely on thousands of GPUs operating continuously, raising electricity demand and carbon concerns. The transition from CPU-centric to GPU-centric computing marks a structural shift in global digital infrastructure with strategic and regulatory implications.

    Introduction

    It is a specialised processor designed to execute large numbers of parallel computations simultaneously. Initially developed for rendering computer graphics, GPUs now form the backbone of artificial intelligence (AI), machine learning, simulations, and high-performance computing.

    The Story So Far

    1. 1999 Launch: Nvidia marketed GeForce 256 as the first GPU.
    2. Shift in Function: Moved from video game graphics to AI infrastructure.
    3. Current Role: Powers generative AI, data centres, scientific simulations, defence modelling.

    What is a Graphics Processing Unit (GPU)?

    1. Parallel Compute Engine: Contains thousands of smaller cores performing repetitive calculations simultaneously.
    2. Workload Design: Optimised for image rendering, matrix multiplication, and tensor operations.
    3. High Bandwidth Memory: Ensures rapid movement of large datasets.
    4. Data-Heavy Efficiency: Suitable for neural networks with millions or billions of parameters.

    How Does a GPU Work? 

    GPU rendering operates through a structured sequence called the rendering pipeline:

    1. Vertex Processing
      1. Function: Processes vertices (corner points of 3D objects).
      2. Operation: Applies mathematical transformations to determine position, rotation, scaling, and camera perspective.
      3. Outcome: Converts 3D coordinates into screen-space positions.
    2. Rasterisation
      1. Function: Converts geometric shapes into pixels.
      2. Operation: Determines which pixels on the screen are covered by each triangle.
      3. Outcome: Transforms vector graphics into a pixel grid.
    3. Fragment Processing
      1. Function: Determines final colour and appearance of each pixel.
      2. Operation: Applies lighting, textures, shading, shadows, reflections.
      3. Outcome: Produces realistic visual effects.
    4. Frame Buffer Writing
      1. Function: Stores processed pixel data in memory.
      2. Operation: Writes final image data into frame buffer for display output.
      3. Outcome: Displays rendered image on screen.

    How Do GPUs Enable Artificial Intelligence?

    1. Matrix Operations: Neural networks multiply large grids of numbers repeatedly.
    2. Tensor Operations: Handles multi-dimensional data structures beyond 2D matrices.
    3. Tensor Cores: Specialised hardware (e.g., Nvidia H100) capable of ~1.9 quadrillion operations per second.
    4. Parallelism: Enables simultaneous processing of thousands of data inputs.
    5. Training Efficiency: Reduces time required for large model training.

    Where is the GPU Located?

    1. Discrete GPU: Separate graphics card connected to CPU via high-speed interface.
    2. Integrated GPU: Embedded within CPU chip.
    3. Data Centre Clusters: Installed in racks powering AI training and inference systems.

    How Are GPUs Different from Central Processing Units?

    1. CPU Architecture: Few powerful cores; optimised for sequential logic and control tasks.
    2. GPU Architecture: Many smaller cores; optimised for repetitive parallel workloads.
    3. Control Logic vs Compute Throughput: CPU manages system operations; GPU maximises computation throughput.
    4. Use Case Distinction: CPUs handle operating systems and general tasks; GPUs handle AI training and graphics.

    How Much Energy Do GPUs Consume?

    1. Board Power: Nvidia A100 consumes ~250 W during training.
    2. Continuous Operation: AI training can run for 12 hours or longer.
    3. Energy Estimate: Four GPUs operating continuously consume ~6 kWh per day (excluding server overhead).
    4. Infrastructure Overhead: Additional 30-60% energy required for cooling, CPUs, networking.
    5. Climate Implication: Data centre expansion increases electricity demand and carbon emissions.

    Does Nvidia Have a Monopoly?

    1. Market Share: Nearly 90% of discrete AI GPU market.
    2. CUDA Ecosystem: Proprietary software platform increases switching costs.
    3. Hardware Performance Edge: High-performance GPUs strengthen dominance.
    4. Regulatory Scrutiny: European authorities examining potential anti-competitive practices.
    5. Entry Barriers: Semiconductor fabrication requires high capital and advanced manufacturing ecosystems.

    Governance and Policy Implications

    1. Competition Regulation: Requires anti-trust oversight to prevent abuse of dominant position.
    2. Digital Sovereignty: Countries dependent on foreign AI chips face strategic vulnerability.
    3. Energy Governance: Necessitates integration of renewable energy and green data centre norms.
    4. Export Controls: Advanced chips increasingly subject to geopolitical restrictions.
    5. Industrial Policy: Encourages domestic semiconductor ecosystem development.

    Conclusion

    GPUs have become foundational to artificial intelligence and modern digital infrastructure. Their dominance raises concerns of market concentration, energy sustainability, and strategic dependence. Effective competition regulation, green computing standards, and domestic semiconductor capacity are essential to ensure technological growth remains inclusive, secure, and sustainable.

    PYQ Relevance

    [UPSC 2020] What do you understand by nanotechnology and how is it helping in health sector?

    Linkage: Both nanotechnology and GPU-based AI fall under GS-3 emerging technologies and test conceptual clarity about hardware-driven technological transformation.

  • ISRO to test improved fire detection algorithm during rabi harvest  

    Why in the News?

    Indian Space Research Organisation will pilot a modified algorithm to better detect farm fire events during the upcoming wheat harvesting season. The move follows discrepancies between satellite detected fires and ground reports flagged by the Commission for Air Quality Management.

    Background: Stubble Burning

    • Paddy stubble generated within a 30 day window in Punjab, Haryana and western UP.
    • Farmers burn residue due to:
      • Short gap between harvest and next sowing cycle
      • Low cost and quick clearance
    • Burning releases PM2.5 and gaseous pollutants.
    • During peak season, farm fires can contribute up to 40 percent of Delhi pollution load.

    Satellite Monitoring Mechanism

    • Fire data based on sun synchronous polar orbiting satellites:
      • NASA Terra and Aqua using MODIS sensor
      • National Oceanic and Atmospheric Administration Suomi NPP using VIIRS sensor
    • Issue identified:
      • Peak burning time shifted from around 1.30 pm in 2020 to nearly 5 pm in 2024.
      • Late evening fires may escape detection due to fixed satellite overpass timings.
    • Rabi Season Focus
      • Wheat harvesting: Late March to May.
    • 2025 data recorded:
      • Punjab: 10,207 fire events
      • Haryana: 1,832
      • NCR districts of UP: 259
    • For first time, CAQM directing monitoring of summer wheat stubble burning.
    [2019] For the measurement/estimation of which of the following are satellite images/remote sensing data used? 1. Chlorophyll content in the vegetation of a specific location 

    2. Greenhouse gas emissions from rice paddies of a specific location 

    3. Land surface temperatures of a specific location 

    Select the correct answer using the code given below: 

    (a) 1 only (b) 2 and 3 only (c) 3 only (d) 1, 2 and 3

  • Padayappa the wild tusker in Munnar

    Why in the News?

    A wild tusker named Padayappa has recently damaged vehicles along the Munnar to Marayur route in Kerala during his musth period, reviving debate over human wildlife conflict and relocation demands.

    Location

    • Munnar, Idukki district, Kerala
    • Roams between Munnar and Devikulam forest ranges

    About Padayappa

    • Approximate age: 60 years
    • Species: Asian Elephant
    • Identifiable by:
      • Limp due to hind leg injury
      • Unusually long tusks
    • Named after the Rajinikanth film Padayappa
    • Known as a tourism icon in Munnar

    Recent Developments

    • Damaged four vehicles this month
    • Over 20 vehicles damaged during last year’s musth period
    • Forest Department Rapid Response Team monitoring movements
    • Officials state aggression linked only to musth, not habitual conflict behavior

    Musth (Prelims Concept)

    • A periodic condition in male elephants
    • Characterised by:
      • Increased testosterone levels
      • Heightened aggression
      • Temporal gland secretion
    • Seasonal and temporary phase
    [2020] With reference to Indian elephants, consider the following statements: 1. The leader of an elephant group is a female. 

    2. The maximum gestation period can be 22 months. 

    3. An elephant can normally go on calving till the age of 40 years only. 

    4. Among the States in India, the highest elephant population is in Kerala. 

    Which of the statements given above is/are correct? 

    (a) 1 and 2 only (b) 2 and 4 only (c) 3 only (d) 1, 3 and 4 only