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GS Paper: GS3

  • Study on Lithium-Rich Red Giant Stars and Helium Abundance

    Why in the News?

    A recent study conducted by Indian Institute of Astrophysics (IIA) has discovered a link between Lithium-rich red giant stars and their enhanced helium abundance.

    What are Red Giant Stars?

    • Overview: Evolved stars that have exhausted core hydrogen, causing the core to contract and the outer layers to expand into a large, cool, reddish envelope.
    • Formation Process: Core contraction increases temperature while the outer shell expands and cools, triggering hydrogen shell burning.
    • Temperature and Luminosity: Surface temperature drops to 2,000–5,000 K, but luminosity rises sharply due to vastly increased radius.
    • Internal Fusion: Helium fusion begins in the core, producing heavier elements like carbon and oxygen.
    • Evolutionary Stage: Represents the late life cycle of medium-mass stars; the Sun will enter this phase in about 5 billion years.
    • End Stage: Outer layers are shed into a planetary nebula, leaving a white dwarf remnant that cools over time.

    Key Findings of the Study:

    • New Discovery: IIA established the first spectroscopic link between helium enhancement and lithium enrichment in red giant stars.
    • Data Source: Based on Himalayan Chandra Telescope observations and archival global spectroscopic datasets.
    • Sample Profile: 20 cool giants studied- 18 red giants and 2 supergiants.
    • Helium-Enriched Stars: Six stars showed high helium-to-hydrogen ratios (He/H > 0.1).
    • Distribution: Five were red giants and one a supergiant, showing a trend toward helium enhancement in lithium-rich giants.
    • Scientific Insight: Offers direct evidence of deep internal mixing and nucleosynthesis shaping surface chemical composition.

    What is the correlation between Lithium and Helium?

    • Coupled Enrichment: All helium-enhanced giants were lithium-rich, suggesting a shared internal mixing mechanism.
    • Asymmetry: Not all lithium-rich giants showed helium enhancement, implying lithium can rise without parallel helium increase.
    • Internal Mixing Role: Deep convection likely dredges up newly formed helium and lithium from the interior to the photosphere.
    • Photospheric Evidence: Confirms mixing-driven changes detectable on the stellar surface during the red giant stage.

    Significance of the Findings:

    • First Measurement: Provides the first direct spectroscopic photospheric helium estimates for normal and lithium-rich red giants.
    • Astrophysical Value: Refines understanding of mixing, nucleosynthesis, and energy transport inside red giant branch (RGB) stars.
    • Galactic Evolution: Improves models of how stars contribute heavier elements to the interstellar medium.
    • Methodological Advance: Strengthens indirect helium-measurement techniques for cool stars where helium lines are not visible.
    • Evolutionary Insight: Shows helium enrichment is integral to changes in luminosity, temperature evolution, and mass-loss pathways.
    [UPSC 2023] Consider the following pairs:

    Objects in space: Description

    1. Cepheids : Giant clouds of dust and gas in space

    2. Nebulae : Stars which brighten and dim periodically

    3. Pulsars : Neutron stars that are formed when massive stars run out of fuel and collapse

    How many of the above pairs are correctly matched?

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

     

  • Recently awarded GI Tags

    Why in the News?

    The Geographical Indications (GI) Registry under the Ministry of Commerce and Industry granted GI recognition to multiple traditional products across India, including Ambaji Marble (Gujarat), Panna Diamond (Madhya Pradesh), and Lepcha Instruments (Sikkim).

    GI Tag/Product

    Details
    Ambaji White Marble (Gujarat)

    		 • Known for pure white color, high calcium content, and durability
    • Sourced from Ambaji Shaktipeeth, Banaskantha
    • Used in Dilwara Temples and Ayodhya Ram Temple
    • Applied by Ambaji Marbles Quarry and Factory Association
    • Contains calcium oxide and silicon oxide, enhancing strength
    • Exported for temple use in USA, New Zealand, and UK
    Panna Diamond (Madhya Pradesh)

    		 • Application by Collectorate (Diamond Branch), Panna
    • Features a light green tint and weak carbon line
    • Managed by NMDC’s Diamond Mining Project
    • Supported by Padma Shri Rajni Kant (GI Man of India)
    • Enhances traceability, authenticity, and export potential
    Sikkim Lepcha Tungbuk

    		 • Traditional three-string musical instrument of Lepcha tribe
    • Holds cultural and spiritual importance in Lepcha music
    • GI granted on Nov 5, 2025 under Musical Instrument category
    Sikkim Lepcha Pumtong Pulit

    		 • Bamboo flute central to Lepcha folk traditions
    • Symbol of Lepcha cultural identity and heritage
    • Preserves traditional instrument-making and youth cultural continuity
    Kannadippaya (Kerala)

    		 • Traditional bamboo mat crafted by Kerala artisans
    • Recognized for eco-friendly material and handwoven design
    • Boosts rural cooperative income and craft heritage branding
    Apatani Textile (Arunachal Pradesh)

    		 • Handwoven by Apatani tribe of Ziro Valley
    • Features geometric motifs and natural dye usage
    • Represents sustainable tribal textile craftsmanship
    Marthandam Honey (Tamil Nadu)

     

    		 • Produced in Kanyakumari district
    • Known for unique floral aroma, high medicinal value
    • Supports local beekeeping and biodiversity-based livelihoods
    Bodo Aronai (Assam)

    		 • Traditional handwoven scarf of the Bodo community
    • Symbol of honor, identity, and ceremonial respect
    • Made using handspun cotton/silk with tribal patterns
    Bedu & Badri Cow Ghee (Uttarakhand)

    		 • Produced from indigenous hill cow breeds
    • Known for nutritional richness and purity from high-altitude regions
    • Promotes mountain organic economy and heritage dairy products

     

    [UPSC 2018] Consider the following pairs:
    Craft. Heritage of
    1. Puthukkuli shawls Tamil Nadu
    2. Sujni embroidery Maharashtra
    3. Uppada Jamdani saris Karnataka
    Which of the pairs given above is/are correct?
    Options: (a) 1 only (b) 1 and 2 (c) 3 only (d) 2 and 3*

     

  • NASA’s ESCAPADE Mission to Mars

    Why in the News?

    NASA launched the ESCAPADE mission aboard the New Glenn rocket developed by Blue Origin.

    About ESCAPADE Mission:

    • Mission Overview: ESCAPADE is a NASA Mars mission consisting of two identical orbiters (Blue and Gold) designed to study how the solar wind interacts with the Martian atmosphere and magnetosphere.
    • Launch: Launched aboard Blue Origin’s New Glenn rocket, marking a major step for commercial heavy-lift launches.
    • Programme: Part of NASA’s SIMPLEx programme, which focuses on low-cost, small planetary missions using compact spacecraft.
    • Science Goal: To understand how Mars lost its ancient thick atmosphere by measuring plasma, magnetic fields, and ion escape processes driven by the solar wind.
    • Trajectory: Uses an innovative path via the Earth–Sun L2 point, loitering for nearly a year before heading to Mars due to an imperfect launch-window alignment; arrival expected in 2027.

    Key Features of ESCAPADE:

    • Twin–Spacecraft Design: Two orbiters operate together to take simultaneous measurements, allowing scientists to separate time-varying vs space-varying phenomena around Mars.
    • Hybrid Magnetosphere Focus: Mars lacks a global magnetic field but has patchy crustal magnetisation; ESCAPADE will map how these regions interact with solar-wind plasma and how ions escape into space.
    • Low-Cost Architecture: Built on Rocket Lab’s Photon spacecraft bus, making ESCAPADE a model for frequent, affordable interplanetary missions (~200–500 kg class).
    • Advanced Instruments:
      1. EMAG (magnetometer) to measure magnetic fields.
      2. EESA (electrostatic analyzer) to analyse ions and electrons.
      3. ELP (Langmuir probe) to study plasma density and temperature.
    • Innovative Mission Timeline:
      • One year at Earth–Sun L2.
      • Transfer to Mars in 2027.
      • Science operations begin after Mars-orbit insertion.
    • Science Operations:
      • String-of-pearls formation: both orbiters on the same orbit, separated by minutes.
      • Divergent orbits: spacecraft split to sample different regions of Mars’s space environment.
    • Commercial Enabling: Demonstrates the role of commercial heavy rockets like New Glenn in future deep-space missions.
    [UPSC 2018] What is the purpose of the US Space Agency’s Themis Mission, which was recently in the news?

    Options: (a) To study the possibility of life on Mars

    (b) To study the satellites of Saturn

    (c) To study the colorful display of high latitude skies*

    (d) To build a space laboratory to study stellar explosions

     

  • Holding up GLASS to India: securing stewardship to tackle AMR

    INTRODUCTION

    AMR in India is now labelled a “serious and escalating threat”, with the latest WHO GLASS report (2025) confirming extraordinarily high resistance levels across commonly used antibiotics. Nearly one in five severe infections in India mirrored or exceeded South and East Asian trends, and one in six confirmed infections was resistant. India’s high infectious disease burden, misuse of antibiotics, weak surveillance, and gaps in healthcare infrastructure continue to aggravate the problem. The article highlights incomplete data, insufficient funding, fragmented stewardship, and the urgent need for rational antibiotic use, surveillance strengthening, and affordable new-generation antibiotics.

    WHY IN THE NEWS? 

    India features prominently in the WHO’s October 2025 GLASS report, which confirms that the country now records some of the highest antibiotic resistance rates globally, particularly for gram-negative pathogens. For the first time, GLASS shows significant data gaps, reflected in India uploading surveillance results from only tertiary hospitals, leaving rural and peripheral areas undocumented. The report highlights a sharp contrast with global progress, exposing India’s limited surveillance expansion, weak stewardship, and slow adoption of newer effective antibiotics, despite AMR being among the country’s gravest public-health threats.

    Understanding the Scale of AMR in India

    1. High Resistance Rates: India shows disproportionately high resistance to commonly used antibiotics, especially in infections caused by E. coli, Klebsiella pneumoniae, Staphylococcus aureus, and pathogens causing sepsis in ICUs.
    2. Escalating Threat Category: WHO labels AMR in India as a “serious and escalating threat,” placing India among the highest global burden countries.
    3. Gram-Negative Pathogens: Severe risks emanate from resistance trends in gram-negative bacteria which limit treatment options in hospitals.
    4. Community-Hospital Gap: Surveillance primarily reflects tertiary hospital data, leaving a large rural and primary-care void, producing incomplete national estimates.

    Why Current Surveillance is Insufficient

    1. Incomplete Data Representation: GLASS data reflects only a segment of India’s population; peripheral, rural, and primary-care levels remain unrepresented, leading to erroneous conclusions.
    2. Fragmented Networks: Laboratories under NCDC’s AMR and AMRRSN networks provide data, but coverage is inadequate for a country of India’s scale.
    3. Operational Challenges: Shortage of trained microbiologists, inconsistent reporting, and infrastructure deficits weaken surveillance reliability.
    4. Underestimation of Burden: Without wider surveillance, actual AMR spread across different geographies or demographic groups remains unknown.

    Kerala’s State-Led Model of AMR Management

    1. State Action Plan Success: Kerala’s progress stems from early adoption of the State Action Plan aligned with India’s National Action Plan (NAP-AMR).
    2. Whole-of-System Approach: Kerala integrates veterinary, human health, and environmental data, demonstrating One Health operationalisation.
    3. Institutional Leadership: Dedicated stewardship committees and infection-control protocols ensure sustained monitoring and policy continuity.

    Antibiotic Stewardship and Public Awareness Challenges

    1. Unregulated Antibiotic Use: Easy over-the-counter access, self-medication, and incomplete courses contribute to rising resistance.
    2. Hospital Overuse: Lack of stewardship committees and infection-control practices deepen resistance in ICUs and emergency departments.
    3. Limited Community Awareness: Behavioural change campaigns remain inadequate, leading to misconceptions about antibiotic effectiveness.
    4. Inappropriate Prescriptions: Physicians often prescribe broad-spectrum antibiotics without culture sensitivity results due to delays or lack of labs.

    Innovation, R&D Pipelines and the Crisis of New Antibiotics

    1. Weak Domestic Innovation: Only 2 of the 32 antibiotics under global development meet WHO innovation criteria.
    2. Positive Trend: India’s CDSCO approved two new antibiotic candidates recently, while six others received global approval.
    3. Global Gap: Out of 97 candidates in preclinical pipelines (2022), few target WHO’s priority pathogens.
    4. High Barriers: Costly R&D, limited incentives, and delayed regulatory approvals weaken India’s innovation environment.

    Global and National Funding Gaps

    1. Insufficient Domestic Funding: India’s AMR response suffers from limited financial allocations, affecting surveillance expansion and lab capacity building.
    2. Gaps in Multilateral Support: Despite WHO’s Global AMR Challenge, LMICs like India lack sustained funding for new antibiotics and diagnostics.
    3. Need for Collaborative Platforms: Strengthened partnerships with bodies like the AMR Industry Alliance and CARB-X can accelerate innovation pipelines.

    Why Solutions Must Prioritise Stewardship, Surveillance, and Affordability

    1. Urgency of Behaviour Change: Stewardship requires both medical and community engagement to reduce irresponsible antibiotic use.
    2. Strengthening Peripheral Health Systems: Decentralised surveillance networks are essential to capture India’s actual AMR burden.
    3. Making New Antibiotics Accessible: India must prioritise affordability and availability given rising MDR (multi-drug resistant) infections in LMICs.
    4. Integrating One Health: Coordinated animal-human-environmental monitoring is indispensable for durable AMR containment.

    CONCLUSION

    India stands at a critical juncture where AMR has outpaced existing stewardship, surveillance, and innovation capabilities. The GLASS 2025 report acts as a mirror reflecting the country’s systemic gaps, from incomplete data and misuse of antibiotics to insufficient funding and slow R&D advancement. A robust national response must integrate strong stewardship, affordable innovation, decentralised surveillance, and a One Health framework to prevent AMR from becoming an unmanageable public-health catastrophe.

    PYQ Relevance

    [UPSC 2014] Can overuse and free availability of antibiotics without Doctor’s prescription be contributors to the emergence of drug-resistant diseases in India? What are the available mechanisms for monitoring and control? Critically discuss the various issues involved.

    Linkage: Because AMR is a recurring public-health crisis with direct links to governance, regulation, and science-tech, making it a favourite UPSC theme. The article shows rampant antibiotic misuse and OTC access driving India’s high resistance rates. This exactly reflects the PYQ’s focus on irrational use, weak monitoring, and stewardship gaps.

  • Urgent update: India needs to revise its CPI urgently

    Introduction

    The October retail inflation data exposed severe inaccuracies in India’s Consumer Price Index (CPI). While headline inflation appeared to fall to just 0.25%, the lowest since January 2012, the decline stemmed from a statistical anomaly, not real deflation. A collapse of 3.7% in the food and beverages index, driven largely by errors in price tracking during a month of actual food inflation (9.7%), dragged the entire CPI downwards. With outdated 2012 weights, GST-era distortions, and wide gaps between measured and perceived inflation, the CPI no longer mirrors reality. The article argues for urgent revision because the index now affects interest rate decisions, welfare planning, and fiscal strategy.

    Why in the news 

    Retail inflation for October collapsed to 0.25%, a 13-year low, appearing at first as a major success. But this fall was driven not by cheaper food but by a historic 3.7% contraction in the food and beverages category, despite actual food inflation touching 9.7%, the highest of the year. This sharp disconnect, caused by outdated weights and flawed price capture, marks one of the most serious statistical discrepancies in India’s CPI since its creation. With RBI’s interest rate decisions tied to CPI, this mismatch between measured inflation and lived inflation has become a significant policy challenge.

    What triggered the inflation anomaly in October 2025?

    1. Historic contraction in food index: The food and beverages category fell 3.7%, the largest drop since the 2012 CPI basket was created.
    2. Actual food inflation 9.7%: Prices in October rose steeply, showing complete divergence between data and reality.
    3. High weightage (46%): Because food accounts for nearly half of CPI, the flawed contraction pulled the entire index downward.
    4. Vegetable prices rising: The fall did not reflect market behaviour; vegetables had been getting costlier.
    5. Statistical anomaly: Not a reflection of cheaper food but a reflection of outdated measurement methods.

    Why is India’s CPI no longer accurate or representative?

    1. Outdated base year (2012): Consumption patterns, e-commerce, GST era changes, lifestyle shifts, none are captured.
    2. Misaligned weights: Household spending patterns have transformed; food no longer holds the same share.
    3. GST impact shows inconsistently: Only clothing and footwear showed inflation lower than last year due to GST cuts, not genuine price movement.
    4. Inconsistent category behaviour: Fuel, housing, tobacco, and miscellaneous inflation was higher than last year, contradicting the headline figure.
    5. Price capture errors: Data is often collected from markets that do not reflect actual consumer behaviour.

    What is the policy significance of this mismatch between CPI and real inflation?

    1. RBI’s rate decisions distorted: RBI surveyed households and found perceived inflation at 7.4%, far above the official CPI.
    2. Risk of wrong interest-rate moves: The RBI Monetary Policy Committee (MPC) uses CPI as its benchmark; incorrect CPI can lead to wrong rate cuts/holds.
    3. Poor signalling to markets: Bond markets, banks, and investors rely on accurate inflation forecasting.
    4. Impact on welfare schemes: Index-linked subsidies, pensions, and poverty estimates become inaccurate.
    5. Misleading economic narrative: Inflation is reported as low while households experience severe price stress.

    Why is a new CPI series urgently required

    1. Mismatch with GST regime: The GST tax cuts have altered category prices but CPI weights do not capture this.
    2. Structural change in Indian consumption: Electronics, services, digital expenses, mobility, none adequately represented.
    3. Incorrect urban-rural representation: Spending patterns in rural India have changed substantially.
    4. Temporary factors skewing data: GST rate cuts temporarily depress inflation readings, masking real trends.
    5. Government acknowledgment: Ministry of Statistics has confirmed work on a new CPI series.

    What is expected from the upcoming CPI revision?

    1. Greater accuracy: The new index will reduce the gap between statistical inflation and lived inflation.
    2. Improved weightages: Food weight may be reduced; services weight may rise.
    3. Better policy coordination: More accurate inflation data for monetary and fiscal decisions.
    4. Alignment with global practices: Frequent re-basing, digital data capture, and dynamic weighting.
    5. Timeline: Expected from the next financial year, improving CPI reliability.

    Conclusion

    India’s inflation measurement system is now at a breaking point. The October anomaly exposes the urgent need to modernize the CPI to reflect contemporary consumption and inflation realities. With monetary policy, welfare spending, and economic narratives relying on CPI, statistical distortions can lead to severe policy missteps. A revised CPI, updated, accurate, and GST-aligned, is essential for credible macroeconomic governance.

    Value Addition

    Consumer Price Index (CPI)

    • Definition: The Consumer Price Index (CPI) is a measure of the average change over time in the prices paid by consumers for a representative basket of consumer goods and services. The CPI measures inflation as experienced by consumers in their day-to-day living expenses.
    • Released by: National Statistical Office (NSO) under the Ministry of Statistics and Programme Implementation (MoSPI).
    • Frequency of release: Monthly, usually around the 12th of every month for the previous month.
    • What is included in the CPI basket:
      • Food & Beverages, Housing, Fuel & Light, Clothing & Footwear, and Miscellaneous services (education, health, transport, communication, recreation, personal care, etc.).
    • Weightage (CPI Combined, 2012 base year):
      • Food & Beverages: ~46%
      • Housing: ~10%
      • Fuel & Light: ~7%
      • Clothing & Footwear: ~6%
      • Miscellaneous: ~31%.

    PYQ Relevance

    [UPSC 2024] What are the causes of persistent high food inflation in India? Comment on the effectiveness of the monetary policy of the RBI to control this type of inflation.

    Linkage: This PYQ is relevant because food inflation, CPI accuracy, and monetary policy are core GS-III themes repeatedly tested by UPSC. The article shows how flawed CPI weights hid real food inflation, directly weakening RBI’s ability to target inflation.

  • Centre releases draft Seeds Bill, 2025

    Why in the News?

    The Ministry of Agriculture and Farmers Welfare has released the Draft Seeds Bill, 2025 for public consultation before its introduction in Parliament.

    Precursor to the Draft Seeds Bill, 2025:

    • Seeds Act, 1966: Regulated seed production, certification, sale, and import/export through central and state seed committees and certification agencies.
    • Seeds (Control) Order, 1983: Added licensing requirements for dealers and expanded oversight of notified seeds.
    • Why Reform? Old laws could not address modern hybrids, biotechnology, private R&D, global seed trade, or digital traceability – creating the need for an updated, technology-ready statute.

    About the Draft Seeds Bill, 2025:

    • Objective: Ensure farmers get affordable, high-quality seeds while improving transparency and ease of doing business in the seed value chain.
    • Purpose: Replaces the Seeds Act, 1966 and Seeds (Control) Order, 1983 to regulate seed quality, curb spurious seeds, strengthen traceability, and modernise India’s seed sector.
    • Scope: Covers seed production, registration, import, sale, quality control, penalties, farmer rights, and digital monitoring.

    Key Provisions of the Draft Bill:

    • Farmer Rights: Farmers may grow, sow, save, use, exchange, share, or sell seeds of any registered variety from their own holdings, except when sold under a brand name.
    • Mandatory Registration of Varieties: All seed varieties meant for commercial sale must be registered (export-only and farmers’ own-use varieties exempt).
    • Registration of Seed Businesses: Producers (non-farmers), processing units, dealers, distributors, and nurseries must register with the designated authority.
    • Digital Traceability: Introduces a Central Seed Traceability Portal; seed packets must carry QR codes to monitor provenance and quality.
    • Graded Penalties: Trivial-to-major offences defined. Minor offences may get warnings; moderate offences attract fines up to ₹2 lakh; major offences (spurious/unregistered seeds) attract fines up to ₹30 lakh and/or imprisonment up to 3 years.
    • Seed Testing & Enforcement: Central and state seed labs can be established/recognised. Inspectors may sample, seize, inspect premises, and verify records.
    • Import Regulation: Imported seeds must meet germination and purity standards; trial and research imports require permits.
    • Ease of Doing Business: Minor offences decriminalised; compliance simplified while retaining strict penalties for serious violations.

    Key Differences: Seeds Act 1966 vs Draft Seeds Bill 2025

    Seeds Act, 1966 / Seeds (Control) Order, 1983 Draft Seeds Bill, 2025
    Farmer Rights Implicit, not clearly articulated Explicit protection to save, use, exchange, share, sell non-branded seeds
    Variety Registration Only notified varieties regulated Mandatory registration for all commercial varieties
    Business Registration Focus on producers/dealers Mandatory for producers, processors, dealers, distributors, nurseries
    Traceability No digital tracking provisions QR-based seed traceability via Central Seed Portal
    Penalties Limited, less structured Graded penalties; major offences up to ₹30 lakh + imprisonment
    Imports Narrow regulation; limited trial mechanisms Structured system for import, research, and trial evaluations
    Ease of Doing Business More regulatory rigidity Decriminalisation of minor offences and reduced compliance burden
    Technological Fit Pre-hybrid, pre-biotech era framework Aligned with modern hybrids, biotech seeds, global seed trade

     

  • Why Hepatitis A deserves a place in India’s Universal Immunisation Programme (UIP)?

    Why in the News?

    Health authorities are debating whether Hepatitis A vaccine should have higher priority for inclusion in Universal Immunisation Programme (UIP) compared to Typhoid Conjugate Vaccine (TCV).

    About Hepatitis A:

    • Overview: Viral infection caused by Hepatitis A Virus (HAV), spreading through contaminated food, water, or close contact with an infected person.
    • Nature of Disease: Leads to acute liver inflammation with fever, jaundice, nausea, abdominal pain, and fatigue.
    • Treatment: No antiviral therapy; illness is self-limiting and recovery occurs within six months with supportive care.
    • Vaccine: Highly effective (90 to 95 percent), long-lasting immunity for 15 to 20 years or lifelong; prevents symptomatic infection.
    • Current Trend: Improved sanitation lowers childhood exposure, but adult susceptibility is rising, increasing disease severity.

    What is Universal Immunisation Programme (UIP)?

    • Launch and Evolution: Started in 1985; later integrated with Child Survival and Safe Motherhood Programme (1992) and National Rural Health Mission (2005).
    • Coverage: Provides free vaccines against 12 diseases–  9 nationally (Diphtheria, Pertussis, Tetanus, Polio, Measles, Rubella, Tuberculosis, Hepatitis B, Hib) and 3 in selected states (Rotavirus, Pneumococcal Pneumonia, Japanese Encephalitis).
    • Achievements: Played a central role in polio eradication, reducing measles deaths, and improving child survival indicators.

    Why Hepatitis A deserves priority?

    • Greater Adult Severity: Shift from childhood to adult infections results in higher rates of acute liver failure.
    • Recent Outbreaks: Reported surges in Kerala, Maharashtra, Delhi, and Uttar Pradesh signal a widening public-health risk.
    • Falling Immunity: Seroprevalence has declined from around 90 percent to under 60 percent in many cities, leaving millions unprotected.
    • Indigenous Vaccine: Biovac-A (Biological E Ltd.) is safe, affordable, and effective, with single-dose protection simplifying rollout.
    • No Resistance Concerns: Viral disease with no antibiotic use eliminates resistance challenges.
    • Cost Advantage: More economical and operationally easier than multi-dose vaccines like typhoid conjugate vaccine.
    • Policy Relevance: Inclusion in the national programme could curb outbreaks and reduce adult liver-failure cases.

    Back2Basics: Hepatitis

    • What is it: Liver inflammation from viruses, alcohol, toxins, drugs, autoimmune disorders, or metabolic issues.
    • Viral Types:
      • A – Fecal-oral; acute; vaccine available.
      • B – Blood/body fluids; chronic risk; vaccine available.
      • C – Blood-to-blood; often chronic; no vaccine; treatable with antivirals.
      • D – Discussed above.
      • E – Fecal-oral; usually acute.
    • Chronic B, C, D: Major drivers of cirrhosis and liver cancer.
    • Prevention: Vaccination (A, B), safe injections, screened blood, safe sex, good hygiene.

     

    [UPSC 2019] Which one of the following statements is not correct?

    (a) Hepatitis B virus is transmitted much like HIV.

    (b) Hepatitis B, unlike Hepatitis C, does not have a vaccine. *

    (c) Globally, the number of people infected with Hepatitis B and C viruses are several times more than those infected with HIV.

    (d) Some of those infected with Hepatitis B and C viruses do not show the symptoms for many years.

     

  • India’s CO₂ Emission Trends as per Global Carbon Budget, 2025

    ​Why in the News?

    The Global Carbon Budget 2025 shows India’s fossil fuel emissions barely rising (3.19 to 3.22 billion tonnes) with growth slowing to 1.4 per cent, hinting at early stabilisation.

    India’s CO₂ Emission Trends:

    • Annual Growth: Fossil fuel CO₂ emissions rose from 3.19 billion tonnes (2024) to 3.22 billion tonnes (2025) a 1.4% increase, significantly slower than the 4% rise seen in 2024.
    • Decadal Trend: Average annual growth fell to 3.6% (2015–2024) from 6.4% (2005–2014), indicating efficiency gains and rapid renewable energy deployment.
    • Sectoral Profile: Roughly 90% of emissions originate from power generation, transport, industry, and buildings; 10% from land-use factors like deforestation.
    • Drivers of 2025 Slowdown: An early monsoon in 2024 reduced electricity demand for cooling; renewable energy growth reduced reliance on coal.
    • Electricity Sector Shift: CREA reported that India’s power-sector CO₂ emissions declined in early 2025 for the first time, due to strong solar and wind generation.
    • Global Context: India is the third-largest CO₂ emitter, yet its per capita emissions (~2.3 tonnes) remain far below the global average and major emitters like the U.S. (14.4 t) and China (8.7 t).
    • Outlook: Global fossil CO₂ emissions expected to rise 1.1% to 38.1 Gt, with total emissions (including land use) stabilising near 42 Gt.

    India’s CO₂ Emission Trends as per Global Carbon Budget, 2025

    What is the Global Carbon Budget?

    • Overview: It is an annual scientific assessment by Global Carbon Project (GCP) that quantifies global CO₂ sources and sinks across fossil fuels, land use, and oceans, forming the most authoritative dataset on global carbon trends.
    • GCP Origins: Established in 2001 under Future Earth and the World Climate Research Programme as a global consortium of climate scientists.
    • Mandate: To measure, monitor, and explain the global carbon cycle and its influence on the climate system.
    • Purpose of the Global Carbon Budget:
      • Quantifies CO₂ sources and sinks globally.
      • Tracks emission trends, carbon sequestration, and atmospheric CO₂ levels.
      • Provides authoritative data for COP negotiations and national climate assessments.
    • Scope and Methodology
      • Covers CO₂, methane (CH₄), and nitrous oxide (N₂O) using global datasets.
      • Combines national inventories, satellite data, and earth system models.
      • Uses the Global Carbon Atlas to visualise national and sector-wise emissions.
    • Significance:
      • Produces transparent, peer-reviewed carbon accounting.
      • Helps evaluate national performance under Paris Agreement targets.
      • Supports policy design on energy transition, carbon removal, and land use.
    • Key Collaborations: Works with major climate bodies including: IPCC, UNFCCC, WMO.
    [UPSC 2024] Consider the following statements:

    I. Carbon dioxide (CO₂) emissions in India are less than 0.5 t CO2/capita.

    II. In terms of CO2 emissions from fuel combustion, India ranks second in Asia-Pacific region.

    III. Electricity and heat producers are the largest sources of CO2 emissions in India.

    Which of the statements given above is/are correct?

    (a) I and III only (b) II only (c) II and III only * (d) I, II and III

     

  • ‘DRISHTI’ System for AI Freight Wagon Safety

    Why in the News?

    Indian Railways is deploying an AI system called DRISHTI (AI-Based Freight Wagon Locking Monitoring System) to spot unlocked or tampered freight wagon doors in motion, developed with IIT Guwahati to improve freight safety.

    About the DRISHTI System:

    • Overview: It is an Artificial Intelligence system developed by the Northeast Frontier Railway with IIT Guwahati TIDF to monitor wagon door-locking integrity.
    • Primary Objective: Detects unlocked, tampered, or improperly sealed wagon doors automatically during train movement to improve freight security.
    • Technology Framework: Uses AI-enabled cameras, computer vision, and machine-learning algorithms to analyse door-locking mechanisms in real time.
    • Operational Value: Ensures cargo safety without halting trains, addressing pilferage, tampering, and human-error-based sealing failures.
    • Current Status: Undergoing successful trials for nearly ten months on selected freight rakes, with high anomaly-detection accuracy.

    Key Features:

    • Real-Time Monitoring: Continuously tracks door position and locking condition using AI-powered imaging units.
    • Anomaly Detection: Flags tampering, loose locks, or improper sealing; sends immediate alerts to control rooms.
    • Non-Intrusive Operation: Functions during full-speed train movement, avoiding delays or stoppages.
    • Automated Alerts: Provides instant notifications for rapid operator response and incident verification.
    • Reduced Manual Checks: Minimises reliance on manual sealing inspections, improving safety and resource efficiency.
    • Data Integration: Compatible with freight-management platforms for audit trails, analytics, and tracking transparency.
    • Scalable Architecture: Designed for phased expansion across national freight routes after successful field validation.
    • Indigenous Innovation: Fully developed in India, supporting the Atmanirbhar Bharat goal in transport and logistics technology.
    • Safety and Efficiency Gains: Enhances wagon security, reduces theft, supports predictive maintenance, and improves overall freight reliability.
    [UPSC 2025] Consider the following statements:

    I. Indian Railways have prepared a National Rail Plan (NRP) to create a future-ready railway system by 2028.

    II. ‘Kavach’ is an Automatic Train Protection system developed in collaboration with Germany.

    III. ‘Kavach’ system consists of RFID tags fitted on track in station section.

    Which of the statements given above are not correct?

    (a) I and II only * (b) II and III only (c) I and III only (d) I, II and III

     

  • Ricin: the new Bio-Weapon

    Why in the News?

    Recent investigations after the Delhi Bomb Blast revealed a plot to use ricin, a deadly biological toxin, for large-scale terror attacks.

    About Ricin:

    • Origin: Ricin is a highly toxic protein derived from the mash left after processing castor beans (Ricinus communis) for castor oil.
    • Discovery: First isolated in 1888 by German scientist Peter Hermann Stillmark, who documented its lethal, cell-destroying properties.
    • Mechanism of Action: Ricin enters human cells and blocks protein synthesis, causing rapid cell death, tissue damage, and multi-organ failure. Even a few micrograms can be fatal.
    • Routes of Exposure: Can cause poisoning through inhalation, ingestion, or injection, each producing sudden symptoms like respiratory collapse, gastrointestinal bleeding, seizures, and circulatory failure.
    • Treatment: No antidote exists; medical management involves supportive care such as oxygen therapy, IV fluids, activated charcoal (if ingested early), and mechanical ventilation.
    • Weaponisation Risk: Due to easy availability from an agricultural by-product and high lethality, ricin is classified globally as a potential bioterrorism agent.

    Legal Classification and Security Implications:

    • International Status: Listed under Schedule 1 of the Chemical Weapons Convention (CWC) and controlled under the Biological Weapons Convention (BWC).
    • Indian Legal Framework: Criminalised under the Chemical Weapons Convention Act, 2000, and the Unlawful Activities (Prevention) Act (UAPA), with offences being non-bailable.
    • Penalties: Violations involving ricin can result in life imprisonment under Indian law.
    • WMD Classification: Covered under the Weapons of Mass Destruction and Delivery Systems Act, 2005, placing it within the legal category of weapons of mass destruction.
    • Dual-Use Concern: Castor is an industrial crop, making ricin a dual-use substance requiring strict monitoring of castor by-products.