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  • Air Pollution Aerosols Intensify and Prolong Winter Fog Over North India: IIT Madras Study

    Why in the News

    A Indian Institute of Technology Madras led study published in Science Advances shows that air pollution aerosols are making winter fog over north India denser and longer lasting, worsening visibility and health impacts.

    About Aerosols

    • Aerosols are tiny solid or liquid particles suspended in the atmosphere.
    • They strongly influence air quality, weather and climate.
    • Natural sources: desert dust, sea spray, volcanic ash, forest fires
    • Human sources: vehicle emissions, industrial pollution, biomass burning, coal and diesel use
    • Primary aerosols are emitted directly.
    • Secondary aerosols form in the air from gases like sulphur dioxide and nitrogen oxides.

    Key Features

    • Extremely small size: penetrate deep into lungs and remain airborne easily
    • Persistence: stay suspended for days to weeks, travel long distances
    • Condensation nuclei: provide surfaces for water vapour to condense, aiding fog and cloud formation
    • Radiative effects:
      • Scatter sunlight: reflective aerosols cool the surface
      • Absorb heat: black carbon warms the atmosphere

    How Aerosols Affect Winter Fog

    • Increase number of fog droplets, making fog thicker
    • Reduce sunlight reaching the surface, causing cooling that sustains fog
    • Slow fog dissipation, leading to prolonged low visibility episodes

    Prelims Pointers

    • Aerosols act as condensation nuclei for fog and clouds
    • Black carbon absorbs heat while sulphate aerosols reflect sunlight
    • Human sources significantly amplify winter fog over north India
    • Aerosols influence health, visibility, weather and climate simultaneously
    [2019] 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? 

    (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

  • PSLV-C62 Mission Failure

    Why in the News

    The Indian Space Research Organisation’s first launch of 2026, the PSLV-C62 mission, failed to place 16 satellites into the intended orbit on 12 January 2026. This marks the second consecutive failure of the Polar Satellite Launch Vehicle (PSLV), ISRO’s most reliable launch vehicle for over three decades.

    About PSLV-C62 Mission

    • Launch Vehicle: Polar Satellite Launch Vehicle
    • Payload: 16 satellites
      • Includes 7 foreign satellites
    • Mission outcome: Failed to reach intended orbit
    • Failure stage: Third stage (after successful completion of first two stages)

    Why the Failure Matters

    • PSLV is known as ISRO’s workhorse, with a long record of success since the 1990s.
    • This is the second straight PSLV failure, the first occurring in May 2025.
    • Consecutive failures raise concerns about reliability in the third stage, a critical phase of orbital insertion.

    Possible Cause of Failure

    • Exact cause not yet identified.
    • Based on the May 2025 failure, issues may relate to:
      • Drop in combustion chamber pressure in the third stage motor
      • Reduced thrust leads to insufficient acceleration needed to stabilise orbit
    • The Failure Analysis Committee report of the previous mission has not been made public.

    Why the Third Stage is Critical

    • The third stage provides high acceleration required to:
      • Maintain orbital velocity
      • Prevent premature orbital decay
    • Any pressure or thrust instability at this stage directly impacts mission success.

    PSLV: Four-Stage Configuration (Prelims Focus)

    1. First Stage
      • Solid propellant
      • Provides lift-off and overcomes gravity and atmospheric drag
      • Carries rocket to ~50–60 km altitude
    2. Second Stage
      • Liquid propellant
      • Improves velocity and stabilisation
    3. Third Stage
      • Solid motor
      • Provides rapid acceleration for orbital insertion
      • Most failure-prone stage in recent missions
    4. Fourth Stage
      • Liquid engines
      • Fine-tunes orbit and deploys satellites

    Prelims Pointers

    • PSLV is a four-stage launch vehicle.
    • Recent PSLV failures occurred during the third stage.
    • Combustion chamber pressure is critical for orbital velocity.
    • PSLV has been operational for over 30 years.
    • ISRO has not yet released the Failure Analysis Committee report for the 2025 failure.
    [2018] With reference to India’s satellite launch vehicles, consider the following statements: 

    1. PSLVs launch the satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites

    2. Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth

    3. GSLV Mk III is a four-stage launch vehicle with the first and third stages using solid rocket motors, and the second and fourth stages using liquid rocket engines. 

    Which of the statements given above is/are correct? 

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

  • DRDO Successfully Flight Tests Man Portable Anti Tank Guided Missile (MPATGM)

    Why in the News?

    The Defence Research and Development Organisation successfully conducted the flight test of the third generation Man Portable Anti Tank Guided Missile (MPATGM) with top attack capability against a moving target on 11 January 2026 at KK Ranges, Ahilya Nagar, Maharashtra.

    About Man Portable Anti Tank Guided Missile (MPATGM)

    • Type: Third generation Fire and Forget Anti Tank Guided Missile
    • Indigenous status: Fully indigenously developed
    • Intended user: Indian Army
    • Launch modes:
      • Tripod based launcher
      • Military Vehicle Mounted launcher

    Key Technological Features

    • Imaging Infrared (IIR) Homing Seeker
      • Enables day and night combat capability
      • Ensures high accuracy after launch without operator guidance
    • Top Attack Capability: Missile strikes the top of enemy tanks, the most vulnerable section
    • Tandem Warhead: Designed to defeat modern Main Battle Tanks (MBTs) with explosive reactive armour
    • All Electric Control Actuation System
    • Advanced Fire Control System
    • High Performance Sighting System
    • Indigenous Propulsion System

    Prelims Pointers

    • MPATGM is a third generation Fire and Forget missile
    • Uses Imaging Infrared (IIR) seeker
    • Has top attack and tandem warhead capability
    • Successfully tested in January 2026
    • Developed by DRDO with BDL and BEL as production partners
    [2024] Consider the following statements: 

    1. Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight

    2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile

    Which of the statements given above is/are correct? 

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

  • [13th January 2026] The Hindu OpED: Early investment in children, the key to India’s future

    PYQ Relevance

    [UPSC 2024] “Besides being a moral imperative of a Welfare State, primary health structure is a necessary precondition for sustainable development.” Analyse.

    Linkage: This PYQ links primary health systems to sustainable development through preventive care, nutrition, maternal and child health, and human capital formation.

    Mentor’s Comment

    India aims to become a developed economy by 2047. Most discussions focus on infrastructure, manufacturing, and digital growth. This article shifts attention to early childhood development (ECD), a less visible but critical area. It argues that without strong investment in the first 3,000 days of life, economic goals remain weak. The article reviews existing child-focused policies and calls for a universal, integrated, mission-mode approach.

    Why in the News?

    India lacks a clear national roadmap for early childhood development, even though early years shape health, learning, and future productivity. Despite success in reducing child mortality, fragmented and survival-focused policies fail to ensure full development, making early investment a high-return national priority, not just welfare.

    What is Early Childhood Care and Development (ECCD)?

    1. It is not a social sector expenditure but a strategic economic investment. 
    2. Scientific evidence confirms that the period from conception to eight years, especially the first 3,000 days, determines physical health, cognitive ability, emotional regulation, and social skills.

    Why are the first 3,000 days critical for national development?

    1. Brain Architecture: Forms rapidly during early childhood, with 80–85% neural development occurring in the first few years, shaping lifelong learning capacity.
    2. Human Capital Formation: Early capabilities determine educational attainment, workforce participation, and earning potential in adulthood.
    3. Irreversibility: Deprivation, neglect, or poor nutrition during this phase leads to developmental losses that are difficult or impossible to reverse later.

    What progress has India achieved in early childhood outcomes?

    1. Child Survival: Reduced infant and under-five mortality through consolidation under the National Health Mission.
    2. Nutrition and Immunisation: Expanded coverage addressing severe malnutrition and vaccine-preventable diseases.
    3. Institutional Framework: ICDS (1975) and its restructuring under Mission Saksham Anganwadi and POSHAN 2.0 laid foundations for early nutrition and care, particularly among poorer households.

    Where does India’s current ECCD approach fall short?

    1. Fragmentation: Interventions remain siloed across health, nutrition, and education without an integrated developmental framework.
    2. Survival Bias: Policy focus prioritises keeping children alive rather than enabling optimal cognitive, emotional, and social development.
    3. Limited Coverage: ECCD initiatives largely target government safety-net beneficiaries, excluding large sections of middle- and upper-income households facing obesity, screen addiction, delayed skills, and behavioural issues.
    4. Late Intervention: Formal developmental support typically begins at 30-36 months, missing the most critical early window.

    What does scientific evidence reveal about early interventions?

    1. Epigenetics: Early-life nutrition, stress, and environmental exposure influence gene expression and long-term health outcomes.
    2. Health Risks: Parental obesity, substance use, poor maternal nutrition, and chronic stress increase risks of non-communicable diseases and developmental delays.
    3. Time Use Paradox: Children spend most early years at home, yet structured guidance on stimulation, play, and emotional nurturing remains scarce.

    Why must ECCD be universal rather than poverty-targeted?

    1. Developmental Challenges: Obesity, physical inactivity, excessive screen exposure, and emotional difficulties affect children across income groups.
    2. Equity and Inclusion: Universal ECCD prevents exclusion errors and ensures national-level human capital strengthening.
    3. Productivity Link: Broad-based developmental deficits undermine workforce quality and long-term competitiveness.

    What early interventions need to be prioritized?

    1. Preconception Counselling: Focuses on nutrition, mental health, lifestyle, and intergenerational impacts, benefiting two generations simultaneously.
    2. Parental Empowerment: Encourages early stimulation through talking, reading, singing, playing, and emotional engagement from infancy.
    3. Growth Monitoring: Enables early detection of delays through periodic, simple assessments.
    4. Quality Early Learning: Addresses undernutrition, obesity, emotional regulation, and life-long health habits for children aged 2-5 years.
    5. Integrated Service Delivery: Breaks silos between health, nutrition, and education, transforming schools into integrated child development hubs.
    6. Social Outreach: Extends ECCD conversations beyond clinics into homes, workplaces, and communities.

    Why is a national mission-mode approach necessary?

    1. Policy Coordination: Requires functional convergence between Ministries of Health, Education, and Women & Child Development.
    2. Teacher Capacity: Necessitates training educators in child development beyond academic instruction.
    3. Ecosystem Building: Engages parents, non-profits, philanthropic institutions, and CSR initiatives to create a supportive ECCD environment.

    Conclusion

    Early childhood care and development is the most cost-effective and high-impact investment India can make to secure its long-term economic, social, and democratic future. While India has succeeded in improving child survival, the absence of a universal, integrated, and development-focused ECCD framework risks locking future generations into avoidable health, learning, and productivity deficits. Treating the first 3,000 days as a national mission, rather than a welfare add-on, will determine whether India’s demographic potential translates into a resilient, skilled, and globally competitive workforce by 2047.

  • If data is the new oil, what does that make data centres?

    Why in the News?

    India is increasingly seen as a likely destination for global “data dumping” as large data centres expand due to AI growth, government incentives, and geopolitical changes. This is a serious issue because data centres place heavy pressure on electricity, water, land, and environmental regulation, especially in water-stressed cities. Unlike earlier views that treated digital infrastructure as low-impact, data centres are now emerging as resource-intensive industrial units, raising concerns about sustainability, weak regulation, and long-term environmental costs.

    What are Data centers?

    1. Physical Digital Infrastructure: Large facilities that store, process, and manage digital data using servers, storage systems, and networking equipment.
    2. Backbone of the Digital Economy: Support cloud computing, e-governance, AI, fintech, e-commerce, and social media services.

    Why is India vulnerable to becoming a “data dumping” destination?

    1. Geopolitical Stability: Provides predictability compared to other global regions, increasing investor preference.
    2. Fiscal Incentives: Offers subsidised land, power, and expedited clearances for data infrastructure.
    3. Domestic Market Scale: Ensures long-term demand for data storage and processing.
    4. AI-Driven Demand: Accelerates need for hyperscale facilities with high energy density.

    Why are data centres no longer “clean” digital infrastructure?

    1. Electricity Intensity: Requires massive grid capacity, substations, and uninterrupted power supply.
    2. Water Dependence: Uses large volumes for cooling, especially where air cooling is not feasible.
    3. Thermal Pollution: Releases waste heat, intensifying urban heat stress.
    4. Industrial Footprint: Mirrors heavy industry in land use, emissions, and infrastructure strain.

    What environmental risks?

    1. Water Stress: Many Indian cities already face chronic water shortages.
    2. Grid Overload: Clustered data centres require grid upgrades and load balancing.
    3. Externalised Costs: Environmental and infrastructure costs often borne by the public sector.
    4. Weak Enforcement: Post-clearance monitoring and compliance remain inadequate.

    What are the governance and regulatory gaps?

    1. Institutional Lacunae: Noted by the Comptroller and Auditor General, Supreme Court, and National Green Tribunal.
    2. Zoning Weaknesses: Data centres not uniformly classified as heavy infrastructure.
    3. Opacity: Non-disclosure agreements restrict public scrutiny.
    4. Fragmented Oversight: Multiple agencies without integrated regulation.

    What lessons emerge from international and domestic resistance?

    1. United States Experience: Community resistance in Virginia, North Carolina, and Minnesota due to water and energy stress.
    2. Transparency Failures: Projects stalled due to non-disclosure and lack of public consultation.
    3. Course Correction: Developers increasingly engaging communities early to reduce backlash.
    4. Indian Parallel: Similar conditions exist but with weaker civic engagement and regulatory checks.

    Risks of unchecked expansion

    1. Capital Intensity: Limits government bargaining power once investments are sunk.
    2. Subsidy Distortions: Shifts public resources toward private digital infrastructure.
    3. Environmental Injustice: Local communities bear costs without proportional benefits.
    4. Governance Risk: Early-stage policy failures become irreversible later.

    Conclusion

    Data centres must be treated as heavy infrastructure, not neutral digital assets. Without enforceable zoning, water-use ceilings, transparent disclosures, and robust environmental oversight, India risks replicating extractive development models under the guise of digital growth. Sustainable digitalisation requires aligning data infrastructure with ecological limits and democratic accountability.

    PYQ Relevance

    [UPSC 2015] Discuss the advantages and security implications of cloud hosting of servers vis-a-vis in-house machine-based hosting for government businesses.

    Linkage: This question examines the trade-offs between efficiency-driven digital governance and strategic data control. It also connects with current debates on data centres, cloud infrastructure, and data sovereignty, where reliance on cloud hosting raises concerns of security, resilience, and regulatory oversight for government systems.

  • Bhairav Battalion: India’s New Combat Ready Force for High Speed Operations

    Why in the News?

    The Indian Army has operationalised a new rapid response combat unit called the Bhairav Battalion, reflecting a major shift towards fast, technology driven and multi domain warfare, especially along sensitive border areas.

    What is the Bhairav Battalion

    • A new age infantry formation raised in 2025
    • Designed for high speed, short notice and independent operations
    • Created after studying lessons from modern conflicts such as the Russia Ukraine war and India’s own border challenges
    • Focuses on hybrid warfare combining conventional combat with drones, electronic disruption and rapid manoeuvre
    [2025] With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements: 

    I. All types of UAVs can do vertical landing

    II. All types of UAVs can do automated hovering

    III. All types of UAVs can use battery only as a source of power supply

    Which of the statements given above are correct?

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

  • Crypto Rules Tightened: Live Selfies and Geo Tagging Mandatory for Users

    Why in the News

    India’s Financial Intelligence Unit has rolled out stringent Anti Money Laundering and Know Your Customer norms for cryptocurrency exchanges, making live selfie verification and geographical tracking compulsory during user onboarding under guidelines issued on 8 January 2026.

    Regulatory Framework

    • Crypto exchanges classified as Virtual Digital Asset service providers
    • Covered as Reporting Entities under the Prevention of Money Laundering Act
    • FIU designated as the single point regulator for crypto exchanges in India

    New Mandatory KYC Requirements

    Live Selfie Verification

    • Capture of live photograph
    • Liveliness detection using eye blinking or head movement
    • Prevents use of static images and deepfakes
    • Confirms physical presence of the user

    Geo Tagging and Technical Data

    • Mandatory capture of
      • Latitude and longitude
      • Date and timestamp
      • IP address of onboarding location

    Penny Drop Verification

    • Re 1 bank transaction
    • Confirms bank account ownership and activity

    Identity and Authentication

    • Permanent Account Number compulsory
    • One additional identity document
      • Aadhaar
      • Passport
      • Voter ID
    • OTP verification of mobile number and email ID
    [2020] With reference to “Blockchain Technology” consider the following statements: 

    1. It is a public ledger that everyone can inspect, but which no single user controls

    2. The structure and design of blockchain is such that all the data in it are about cryptocurrency only

    3. Applications that depend on basic features of blockchain can be developed without anybody’s permission. 

    Which of the statements given above is/are correct? 

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

  • Kathputli Art of Rajasthan 

    Why in the News?

    The traditional Kathputli art of Rajasthan, centred in Kathputli Nagar of Jaipur, highlights India’s rich intangible cultural heritage, where nearly 250 artisan families continue a centuries old puppet tradition amid challenges from modern entertainment.

    What is Kathputli?

    • Kathputli is one of India’s oldest folk puppet traditions
    • The word derives from
      • Kath meaning wood
      • Putli meaning doll
    • Puppets are string operated wooden figures with painted faces and colourful costumes

    Region and Community

    • Practised mainly in Rajasthan
    • Kathputli Nagar (Puppets Colony) in Jaipur is a major living hub
    • Craft is hereditary, passed down across generations within families

    Historical Significance

    • Traditionally performed by travelling storytellers
    • Used to narrate
      • Tales of Rajput kings and warriors
      • Folk legends and moral stories
    • Served as a mass communication medium before print and digital media

    Current Challenges

    • Competition from digital entertainment
    • Economic insecurity for artisans
    • Dependence on tourism and cultural events

    Prelims Pointers

    • Kathputli is a string puppet tradition
    • Originated in Rajasthan
    • Major hub is Kathputli Nagar, Jaipur
    • Puppets are made of wood and cloth
    • Historically used to narrate royal and folk tales
    [2024] Which one of the following was the latest inclusion in the Intangible Cultural Heritage List of UNESCO? 

    (a) Chhau dance 

    (b) Durga Puja 

    (c) Garba dance 

    (d) Kumbh Mela

  • Show Cause Notice on Bargi Dam 

    Why in the News?

    The National Dam Safety Authority issued a show cause notice to the Narmada Valley Development Authority over serious safety lapses at Bargi Dam.

    About Bargi Dam

    • A major multipurpose dam
    • Used for irrigation, drinking water supply, and hydroelectric power generation
    • Jabalpur district, Madhya Pradesh
    • Constructed on the Narmada River

    Historical Background

    • Built under the Narmada Valley Development Project
    • First completed major dam among the planned series on the Narmada in Madhya Pradesh
    • Became the foundation project for the state’s Narmada basin development strategy

    Key Features

    • 21 spillway gates: Regulate flood discharge and reservoir levels during heavy rainfall
    • Bargi Diversion Project: Canal network supplying irrigation to drought prone regions
    • Rani Avantibai Lodhi Sagar Project: Large scale storage and distribution system for irrigation and water supply
    • Large reservoir supporting: Drinking water, Hydropower, Fisheries and Tourism and recreation

    Significance

    • Provides drinking water to Jabalpur and nearby districts
    • Supports agriculture through assured irrigation
    • Contributes to electricity generation
    • Boosts regional development and eco tourism

    Institutional Context

    National Dam Safety Authority

    • Apex body under the Dam Safety Act 2021
    • Responsible for surveillance, inspection, and safety compliance of specified dams

    Narmada Valley Development Authority

    • Implements and manages projects under the Narmada basin
    • Responsible for operation and maintenance of dams like Bargi

    Prelims Pointers

    • Bargi Dam is on the Narmada River
    • Located in Madhya Pradesh
    • Part of the Narmada Valley Development Project
    • NDSA acts under the Dam Safety Act 2021
    • Spillway gates are crucial for flood control
    [2016] The Narmada river flows to the west, while most other large peninsular rivers flow to the east. Why? 

    1. It occupies a linear rift valley

    2. It flows between the Vindhyas and the Satpuras

    3. The land slopes to the west from Central India

    Select the correct answer using the codes given below

    (a) 1 only (b) 2 and 3 (c) 1 and 3 (d) None

  • [12th january 2026] The Hindu OpED: Reimagining delimitation

    PYQ Relevance

    [UPSC 2024] What changes has the Union Government recently introduced in the domain of Centre-State relations? Suggest measures to be adopted to build the trust between the Centre and the States and for strengthening federalism.

    Linkage: The question is directly relevant to GS Paper II (Federalism and Centre-State relations). The delimitation debate reflects how institutional decisions by the Union can alter State power, making trust-building and cooperative federal mechanisms central to sustaining Indian federalism.

    Mentor’s Comment

    The impending delimitation exercise after 2026 has emerged as a critical constitutional issue with deep federal and political consequences. The article examines how population-based representation may structurally disadvantage southern States. This debate has direct relevance for representation, equity, and cooperative federalism under GS Paper II.

    Why in the News

    India is approaching a major delimitation exercise after 2026, when the freeze on seat allocation based on population ends. The issue is important because southern States may lose political representation despite controlling population growth. This is a clear departure from earlier decades, when seats were frozen to avoid penalising such States. The impact is nationwide, with long-term effects on federal balance, parliamentary power, and democratic fairness.

    What has changed in India’s delimitation framework?

    1. Constitutional freeze: Parliamentary seats were frozen based on the 1971 Census to incentivise population stabilisation.
    2. Policy shift: The freeze ends after the first Census conducted post-2026.
    3. Institutional trigger: A new Delimitation Commission is expected to be constituted after 2029.
    4. Structural impact: Representation will realign strictly with population size, altering regional political balance.

    Why do southern States face disproportionate losses?

    1. Demographic success: Southern States reduced fertility through education and health investments.
    2. Relative population decline: Slower population growth reduces their share in national totals.
    3. Seat reallocation effect: Population-based delimitation transfers seats to high-growth northern States.
    4. Political consequence: Reduced parliamentary influence despite better governance outcomes.

    How does population-based representation create perverse incentives?

    1. Rewarding high fertility: States with higher population growth gain more seats.
    2. Punishing stabilisation: States that controlled population lose political power.
    3. Policy distortion: Weakens incentives for long-term human development investments.
    4. Federal imbalance: Shifts dominance towards large-population States.

    What alternative models does the article propose?

    1. Increasing total seats: Expands Lok Sabha strength while retaining proportional shares.
    2. Redistribution using 2011 Census: Adjusts seats without penalising earlier performers.
    3. Equal State representation: Ensures minimum parity across States regardless of population.
    4. Weighted representation: Balances population size with demographic performance indicators.

    Why is the Digressive Proportionality principle relevant?

    1. Conceptual basis: Larger States receive more seats but fewer per capita than smaller States.
    2. Comparative example: Used in the European Union Parliament.
    3. Equity outcome: Prevents domination by large States.
    4. Democratic balance: Protects both population equality and federal fairness.

    What role should constitutional institutions play?

    1. Finance Commission precedent: Rewards demographic performance through fiscal transfers.
    2. Institutional symmetry: Delimitation Commission can adopt similar equity principles.
    3. Performance linkage: Aligns political representation with responsible governance.
    4. Negotiated federalism: Requires Centre–State consensus before implementation.

    Conclusion

    Delimitation must strike a balance between population-based representation and federal equity. A purely demographic approach risks penalising States that achieved population stabilisation through effective governance. A calibrated, consensus-driven framework is necessary to preserve cooperative federalism, democratic fairness, and long-term national unity.