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  • World Soil Day 2025 

    Why in the news?

    Observed on 5 December each year, World Soil Day 2025 highlights the need to protect soil health amid rapid urbanization. Theme: Healthy Soils for Healthy Cities.

    Objective

    • Raise global awareness on soil degradation
    • Promote sustainable soil management
    • Highlight soil’s significance for food security, water regulation, biodiversity, and climate resilience

    History

    • Proposed by the International Union of Soil Sciences in 2002
    • Supported by FAO and led by the Kingdom of Thailand
    • UN General Assembly declared December 5 as World Soil Day in 2013
    • First official observance: 2014

    Why Focus on Urban Soil

    • Important for stormwater absorption and flood control
    • Helps in temperature regulation in cities (reduces heat island effect)
    • Filters air and water pollutants
    • Supports urban biodiversity
    • Currently threatened by concretization, pollution, and shrinking green spaces

    Global Concerns

    • Takes up to 1,000 years to form a few centimeters of fertile soil

    The black cotton soil of India has been formed due to the weathering of (2021)

    (a) brown forest soil 

    (b) fissure volcanic rock 

    (c) granite and schist 

    (d) shale and limestone

  • Tensor Processing Unit (TPU) 

    Why in the news?

    Meta is in advanced talks with Google to use its Tensor Processing Units for large scale AI workloads, indicating a major shift in the AI chip ecosystem. This led to a drop in Nvidia’s stock due to concerns over market share loss.

    What is a TPU

    • A specialized hardware chip designed to accelerate artificial intelligence and machine learning processing
    • Developed by Google in 2016
    • Optimized for tensor computations used in deep learning
    • Widely deployed in data centers and cloud platforms

    Why TPUs are Important

    • Deep learning models require high-speed matrix and tensor calculations
    • CPUs are optimized for general-purpose tasks
    • GPUs are effective for parallel graphics and AI workloads
    • TPUs surpass them in efficiency for specific deep learning operations

    How TPUs Work

    • Built to handle large scale tensor and matrix computations
    • Use massive parallelism to execute numerous operations simultaneously
    • Consume less energy while delivering high throughput
    • Include specialized circuits to avoid unnecessary general-purpose processing overhead

    What are GPU and TPU? 

    ​​GPU: general-purpose parallel compute processor (Used by Navidia)

    TPU: AI-specific chip optimised for deep learning tensor operations

    With the present state of development, Artificial Intelligence can effectively do which of the following? (2020)

    (1) Bring down electricity consumption in industrial units

    (2) Create meaningful short stories and songs (3) Disease diagnosis

    (4) Text-to-Speech Conversion

    (5) Wireless transmission of electrical energy

    Select the correct answer using the code given below:

    (a) 1, 2, 3 and 5 only (b) 1, 3 and 4 only (c) 2, 4 and 5 only (d) 1, 2, 3, 4 and 5

  • INS Aridhaman

    Why in the News

    The Indian Navy has indicated that INS Aridhaman, India’s third nuclear powered ballistic missile submarine (SSBN), will be inducted soon.

    About INS Aridhaman

    • Second submarine of the Arihant class SSBNs
      • Developed under the Advanced Technology Vessel (ATV) project
      • Built at Ship Building Centre, Visakhapatnam
      • Strengthens India’s nuclear triad with credible sea based deterrence.

    Strategic Significance 

    • Enhances deterrence posture under No First Use policy
      • Consolidates India’s position as a blue water navy
      • Increases maritime security presence in the Indian Ocean Region

    Note: A blue water navy is a maritime force that can operate far beyond its own coastal waters and project power across the deep oceans of the world.

    Consider the following statements: (2023)

    1. Ballistic missiles are jet-propelled at sub-sonic 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

  • Humpback Whale Population Recovery

    Why in the News

    The Humpback whale population has seen a major recovery from about 10,000 to nearly 80,000, due to successful conservation measures and their ability to adapt their food sources.

    Humpback Whale 

    • Scientific Name: Megaptera novaeangliae
      Family: Balaenopteridae (Rorqual whales)
      Type: Baleen whale

    Distribution and Migration

    • Found in all major oceans from sub polar waters to equatorial regions
      • Known for long distance migrations: Polar regions in summer for feeding and Tropical/subtropical seas in winter for breeding

    Physical Characteristics

    • A prominent hump in front of the dorsal fin
      • Extra long pectoral fins (inspiration for the name Megaptera meaning big winged)
      Females larger than males

    Feeding and Behaviour

    • Unique feeding strategy: Bubble Net Feeding
    • Whales exhale bubbles while spiraling upward to trap prey
    • Diet: Krill and various schooling fish like anchovies, sardines, mackerel, cod, capelin

    Lifespan and Reproduction

    • Sexual maturity: 4 to 10 years
      • One calf every 2 to 3 years

    Conservation Status

    • IUCN Red List: Least Concern
      • Population recovery highlights the success of global marine conservation policies and sustainable whaling bans
    With reference to ‘dugong’ a mammal found in India, which of the following statements is/are correct? (2015)

    (1) It is a herbivorous marine animal

    (2) It is found along the entire coast of India

    (3) It is given legal protection under Schedule I of the Wildlife (Protection) Act 1972. 

    Select the correct answer using the code given below. 

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

  • Dudhwa Tiger Reserve and Rainbow Water Snake 

    Why in the News

    A Rainbow Water Snake (Enhydris enhydris) was documented for the first time in Uttar Pradesh with photographic evidence from the buffer zone of Dudhwa Tiger Reserve.

    Dudhwa Tiger Reserve 

    • Location: Indo Nepal border, Lakhimpur Kheri district, Uttar Pradesh
      Established: 1988
      Area: 1,284 sq km
      Constituents:
    • Dudhwa National Park
    • Kishanpur Wildlife Sanctuary
    • Katerniaghat Wildlife Sanctuary
    • Buffer includes North Kheri, South Kheri, and parts of Shahjahanpur forest divisions
    • Habitat Type: Typical Tarai Bhabar ecosystem of Upper Gangetic Plains
      Rivers:
    • Sharda (near Kishanpur)
    • Geruwa (through Katerniaghat)
    • Suheli and Mohana (in Dudhwa NP)
    • All are tributaries of the Ghagra River
    • Vegetation: North Indian Moist Deciduous forests, noted for Sal
      Flora Examples: Sal, Asna, Asidha, Haldu, Faldu, Gahmhar, Kanju

    Rainbow Water Snake 

    • Scientific Name: Enhydris enhydris
      Conservation Status: IUCN: Least Concern
      Nature: Slightly venomous, fish eating freshwater snake
      Distribution: South and Southeast Asia including India, Nepal, Bangladesh, Myanmar, Sri Lanka, Thailand etc.
      Habitat: Marshlands, ponds, rice fields freshwater zones
      Distinctive Features:
    • Up to 130 cm long
    • Two pale stripes along body converging near crown
    • Brown to greenish brown body with pale belly
    In India, if a species of tortoise is declared protected under Schedule I of the Wildlife (Protection) Act, 1972, what does it imply? (2017)

    (a) It enjoys the same level of protection as the tiger

    (b) It no longer exists in the wild, a few individuals are under captive protection; and how it is impossible to prevent its extinction

    (c) It is endemic to a particular region of India. 

    (d) Both (b) and (c) stated above are correct in this context.

  • RBI Integrated Ombudsman Scheme (RB-IOS) FY25 

    Why in the News
    The RBI’s Annual Report of the Ombudsman Scheme highlighted a growth of 13.55% in complaints under RB-IOS during FY25, rising to 1.33 million from 1.18 million in FY24.

    What is RB-IOS?
    • A unified dispute redress mechanism of the Reserve Bank of India covering banks, NBFCs, and authorized payment system participants.
    • Aims to simplify the process by introducing One Nation One Ombudsman framework.

    Sources of Complaints
    • Office of RBI Ombudsman (ORBIO) and Centralised Receipt and Processing Centre (CRPC)
    • ORBIO handled nearly 0.30 million complaints in FY25 (0.82% rise YoY)

    Major Categories of Complaints

    1. Loans and advances: 29.25% of total complaints (highest)
    2. Credit cards: 20.04% increase YoY
    3. Mobile/electronic banking: 16.86% share (declined by 12.74% YoY)

    Entity-wise Break-up
    • Banks: 0.24 million complaints (81.53% of ORBIO complaints)
    • NBFCs: 43,864 complaints (14.80%)
    • Among banks:

    • Private sector banks share rose: 34.39% to 37.53%
    • Public sector banks share fell: 38.32% to 34.80% 

    Disposal of Complaints
    • ORBIOs disposed 0.29 million complaints with a 93.07% disposal rate
    • Maintainable complaints: 62.16% of disposed

    • 51.91% resolved through mutual settlement, conciliation, mediation
    • 43.36% rejected
    The Reserve Bank of India regulates the commercial banks in matters of (2013)

    (1). liquidity of assets 

    (2). branch expansion 

    (3). merger of banks 

    (4). winding-up of banks 

    Select the correct answer using the codes given below. 

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

  • [4th December 2025] The Hindu OpED: A missing link in India’s mineral mission

    PYQ Relevance

    [UPSC 2022] Do you think India will meet 50 percent of its energy needs from renewable energy by 2030 ? Justify your answer. How will the shift of subsidies from fossil fuels to renewables help achieve the above objective ? Explain.

    Linkage: India’s renewable targets depend on critical minerals for solar, wind, and EVs, making processing gaps a strategic risk. The PYQ links directly to the article’s theme that energy goals need a secure, domestic critical-mineral value chain.

    Mentor’s Comment

    India’s mining policy has entered a decisive phase. While recent reforms emphasise exploration and raw mineral extraction, the real bottleneck lies in the missing domestic processing and refining capacity. This gap exposes India to external vulnerabilities, particularly China’s dominance in this space. The article below breaks down this structural challenge in an exam-ready format for UPSC aspirants.

    Introduction

    India has intensified its focus on critical minerals due to global supply-chain shifts, rising technology needs, and geopolitical tensions. The Union Cabinet’s ₹7,280-crore rare-earth magnet scheme and the new G20 framework highlight the urgency of building a self-reliant processing ecosystem. However, the country still imports almost all refined critical minerals despite possessing resources. This mismatch between mining and processing threatens India’s energy transition, semiconductor ambitions, and defence manufacturing. The missing link in India’s mineral mission is not exploration, it is domestic refining and value addition.

    Why in the news

    India’s recent rare-earth magnet scheme and the growing push for critical minerals have highlighted a structural weakness: India mines several critical minerals but processes almost none. This is a major vulnerability at a time when China controls over 90% of global rare-earth processing, and geopolitical frictions like the U.S.-China tech war have tightened export controls. India imports nearly all of its lithium, graphite, titanium, and processed rare earths, even when domestic mining exists. Thus, the real bottleneck in the mineral value chain is processing and refining, which threatens India’s clean-energy future, semiconductor plans, and defence manufacturing goals.

    What makes processing the missing link in India’s mineral mission?

    1. Mining-Processing Mismatch: India mines seven critical minerals (copper, graphite, silicon, tin, titanium, rare earths, zirconium) but lacks refining capability, forcing dependence on imports.
    2. High Import Vulnerability: Domestic mining has risen, but refined imports still constitute almost the entire requirement of high-purity materials.
    3. China’s Dominance: China controls 90%+ of global rare-earth processing, battery precursors, and polysilicon, exposing India to supply shocks.

    Why are India’s critical mineral imports a strategic concern?

    1. Exposure to Global Frictions: The U.S.-China tech conflict has triggered export controls, which directly affect India’s energy and electronics sectors.
    2. Dependence for Clean Energy: Solar panels, EVs, and storage depend on refined minerals that India does not process domestically.
    3. High-Purity Material Shortages: Imports help meet demand but do not strengthen India’s long-term industrial resilience.

    What steps can India take to strengthen domestic processing capacity?

    1. Centres of Excellence and Innovation Engines
      1. Centres of Excellence: Nine Centres under the National Critical Mineral Mission must drive specialised research to develop high-purity compounds and industrial materials.
      2. Focus on Indigenous Technologies: Emphasis on innovative processing technologies that can be scaled from labs to commercial use.
      3. Institutional Support: IITs, NITs, and research institutes should conduct life-cycle modelling and cost-benefit assessments.
    2. Unlocking Secondary Resources

      1. Coal Ash Recovery: India generates 250 million tonnes of coal ash annually; extracting gallium, rare earths, cobalt, germanium is feasible.
      2. Industrial By-Products: Aluminium plants generate residues containing critical metals.
      3. Pilot Projects: CSIR and IITs conducting ash recovery pilots can feed processed materials into the value chain.
    3. Building a Skilled Metallurgical Workforce

      1. New Processing Curriculum: Training technicians in hydrometallurgy, pyrometallurgy, and advanced refining.
      2. Industry-Lab Integration: Diploma-level programmes and academic partnerships to create specialised talent.
      3. Projected Employment: Thousands of jobs through NCMM and industry collaborations.
    4. De-risking Investment Through Financial Instruments

      1. Government Assurances: U.S.-style procurement guarantees and price stabilisation mechanisms can incentivise private investment.
      2. Strategic Stockpiling: India can turn itself into a market-stabilising actor through stockpiling and calibrated release.
    5. Improving Overseas Acquisitions and Midstream Capabilities

      1. Beyond Raw Ore Imports: Indian overseas acquisitions should focus on refining assets, not just mining.
      2. Bilateral Partnerships: Co-investor and co-processing collaborations through critical mineral parks.
      3. Focus on High-Purity Refining: Consistent high-purity output strengthens downstream industries such as defence and electronics.

    Conclusion

    India’s critical-mineral strategy will succeed only if domestic refining and processing capacity develops in tandem with mining. The future of India’s clean energy transition, electronics manufacturing, and defence preparedness depends on closing this midstream gap. Transforming India into a resilient and reliable mineral-processing hub is the missing link that determines whether India becomes a rule-maker or remains a resource-dependent economy.

    Rare Earth Magnet Scheme (₹7,280 crore)

    Objective and Rationale

    1. Import Substitution: Reduces dependence on China for permanent magnets used in EVs, wind turbines, electronics, and defence systems.
    2. Strategic Security: Strengthens domestic capability in magnets essential for guided missiles, drones, satellites, and precision instruments.
    3. Energy Transition Push: Supports India’s renewable energy and electric mobility targets by securing critical magnet supply.

    Key Features of the Scheme

    1. End-to-End Integration: Covers the value chain from mineral refining-alloy production-magnet manufacturing.
    2. Domestic Production Incentives: Encourages industry to set up plants for Neodymium-Iron-Boron (NdFeB) and Samarium-Cobalt (SmCo) magnets.
    3. Technology Development Focus: Promotes advanced metallurgical processes and IP creation in high-performance magnets.
    4. Strategic Partnerships: Enables collaborations with global firms for technology transfer and joint R&D.
  • Rupee breaches 90-mark: What’s driving the slide

    INTRODUCTION

    The rupee slipping below ₹90-per-dollar has raised fresh concerns about the economy. What makes it notable is that this fall comes despite stable domestic indicators like easing inflation and steady growth. The pressure is largely external, persistent dollar outflows, a widening trade deficit, slowing exports, and delays in the Indo-US trade deal. In response, the RBI is allowing a gradual adjustment instead of intervening sharply.

    Why is the rupee depreciating?

    1. Persistent dollar outflows: Investors are shifting to attractive US markets; domestic markets face profit-booking.
    2. Strong US dollar index: Dollar strength has continued on global markets for over 14 months, creating consistent pressure on emerging-market currencies.
    3. Trade deficit expansion: Merchandise exports contracted by 11.8% YoY in October, slipping to a 12-month low of $34.4 billion; imports declined only marginally.
    4. Gold, electronics, industrial imports: Non-oil, non-gas imports rose by 12.4% YoY to $46.5 billion, driven by strong demand for machinery, electronics, and festive consumption.
    5. Delay in Indo-US trade deal: The uncertainty has weighed on investor sentiment and weakened the rupee further.

    How is the trade deficit shaping currency movement?

    1. Widening merchandise gap: Despite falling global crude prices, India’s import bill remains high due to electronics, machinery, and industrial goods.
    2. Export slowdown: Engineering goods, gems and jewellery, pharmaceuticals, and chemicals recorded weak performance.
    3. Mixed services exports: IT services showed resilience, but the slowdown in global discretionary spending has affected margins.
    4. Oil imports: Brent prices have eased, but import volumes remain strong due to festive demand and industrial recovery.

    How are capital flows influencing the slide?

    1. Portfolio investor withdrawal: FPIs have sold equities worth ₹43,000 crore in the last two months.
    2. NSDL data signal caution: Investors have been pulling out since January after strong equity gains
    3. Shift to safe assets: High US yields continue to attract global capital away from emerging markets.
    4. Domestic market underperformance: Broader markets have not matched earlier highs, reinforcing capital outflows.

    What is the RBI’s stance?

    1. Limited intervention: The RBI is allowing a gradual depreciation, instead of sharply defending a level.
    2. Focus on smoothing volatility: Intervention is likely only to prevent excessive swings, not to hold the rupee below 90.
    3. Reversal signal: A more decisive intervention may come only when rupee volatility rises sharply or external shocks intensify.

    Which commodities and sectors are impacted?

    1. Gold imports: Gold prices surged due to the weaker rupee; imports rose 21% to 78 tonnes and ₹56,000 crore in value.
    2. Electronics and machinery: High demand for smartphones, computers, chips, and engineering goods has inflated import bills.
    3. Petroleum products: Despite cooling global crude prices, India’s petroleum imports remain elevated.

    Way Forward

    1. Boost Export Competitiveness: Strengthen logistics, cut regulatory delays, and diversify exports into high-value sectors like electronics, machinery, and pharmaceuticals.
    2. Fast-Track Trade Agreements: Conclude pending trade deals, especially the Indo-US trade pact, to improve market access and restore investor confidence.
    3. Reduce Import Dependence: Expand domestic manufacturing of electronics, critical minerals, and energy inputs to ease pressure from large non-oil imports.
    4. Stabilise Capital Flows: Encourage long-term FDI and stable institutional investments to minimise vulnerability to volatile FPI outflows.
    5. Strengthen Forex Buffers: Build reserves gradually to enhance India’s ability to manage external shocks and currency volatility.
    6. Deepen Financial Markets: Broaden corporate bond markets and promote rupee-denominated overseas borrowing to reduce dollar dependence.
    7. Calibrated RBI Intervention: Maintain the current managed-float approach but intervene sharply during disorderly market conditions.
    8. Stable Macroeconomic Policy Signals: Provide predictable fiscal and trade policy to reduce uncertainty and strengthen currency sentiment.

    CONCLUSION

    The rupee’s decline past the ₹90 mark reflects evolving external vulnerabilities rather than core domestic weaknesses. Dollar outflows, trade deficits, import surges, and delayed trade negotiations have all combined to push the currency downward. The RBI’s calibrated stance indicates a preference for stability over aggressive intervention. Going forward, external sector reforms, export competitiveness, and strategic trade deals will be crucial in restoring confidence and strengthening the rupee.

    PYQ Relevance

    [UPSC 2018] How would the recent phenomena of protectionism and currency manipulations in world trade affect macroeconomic stability of India?

    Linkage: The rupee’s fall past ₹90 mirrors global currency pressures and dollar dominance discussed in the PYQ. Export slowdown, delayed trade deal, and capital outflows in the article directly show how external currency shifts impact India’s macroeconomic stability.

  • WHO Issues Global Guidelines on GLP-1 Drugs for Obesity 

    Why in the News?

    The World Health Organization (WHO) has released its first global guidelines (Dec 1, 2025) supporting the use of GLP-1 (Glucagon-Like Peptide-1) drugs as long-term treatment for obesity in adults, alongside diet and exercise.
    These guidelines emphasise equitable access, affordability, and caution about long-term safety.

    What are GLP-1 Drugs?

    • GLP-1 = Glucagon-Like Peptide-1 receptor agonists
    • Originally developed for type 2 diabetes
    • Now widely used for medically supervised weight loss
    • Examples: Semaglutide, Tirzepatide, Liraglutide
    • Mechanism:
      • Reduce appetite
      • Slow gastric emptying
      • Improve insulin sensitivity

    Key WHO Recommendations

    Conditional approval for adults

    • GLP-1 drugs may be used for long-term obesity management
    • Excluded: pregnant women
    • Reason for “conditional” status:
      • Limited long-term efficacy & safety data
      • Uncertainty about outcomes after discontinuation
      • High cost and global inequity in access

    Must be combined with lifestyle interventions

    • Balanced diet + regular physical activity remain essential
    • Drugs cannot replace behavioural changes

     Equity and affordability

    • WHO urges:
      • Generics development
      • Insurance coverage
      • Lower pricing
    • Obesity’s global economic cost projected to reach $3 trillion by 2030
    A company marketing food product advertises that its items do not contain trans-fats. What does this campaign signify to the customers? (2011)

    1. The food products are not made out of hydrogenated oils. 

    2. The food products are not made out of animal fats/oils. 

    3. The oils used are not likely to damage the cardiovascular health of the consumers. 

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

  • Saving Rock Eagle Owl Eggs at a Telangana Quarry 

    Why in the News?

    A rare conservation incident unfolded at Yenakathala village, Vikarabad district (Telangana) where operations in a stone quarry were halted for 30+ days to protect five eggs of the endangered Rock Eagle Owl found in a rock crevice. The quarry is incurring ₹1.2 lakh loss per day (₹35 lakh total) to ensure safe hatching. This has been hailed as a “miracle” rescue and an example of community-led wildlife protection.

    About the Rock Eagle Owl (Indian Eagle-Owl) – Bubo bengalensis

    • Also called Bengal Eagle-Owl
    • Large horned owl species
    • Habitat: Hilly scrub forests, cliffs, rock crevices
    • Camouflage: Brown & grey plumage with a white throat patch
    • Distribution: Throughout India
    • IUCN Status: Least Concern globally, but population decreasing
    • In India:
      • Protected under Schedule I, Wildlife Protection Act, 1972
      • This places it at par with species like tigers and elephants in terms of legal protection
    • Threats: 
      • Habitat loss
      • Quarrying and mining
      • Poaching (₹35–40 lakh per bird in black market)
      • Superstitious killings

    Important:

    • Nesting sites are difficult to locate; nests are usually in rock niches and cliffs, not trees.
      The species abandons the nest if touched by humans.
    In India, if a species of tortoise is declared protected under Schedule I of the Wildlife (Protection) Act, 1972, what does it imply ? (2017)

    (a) It enjoys the same level of protection as the tiger. 

    (b) It no longer exists in the wild, a few individuals are under captive protection; and how it is impossible to prevent its extinction. 

    (c) It is endemic to a particular region of India. 

    (d) Both (b) and (c) stated above are correct in this context.