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  • St Francis Xavier and Goa

    Why in the News

    Francis Xavier, the patron saint of Goa, is in the news following a controversy involving alleged derogatory remarks by a YouTuber, which led to protests and raised concerns about communal harmony in Goa.

    Key Facts About St Francis Xavier

    • Born in Spain in 1506
    • One of the founding members of the Society of Jesus (Jesuit Order)
    • Arrived in Goa in 1542 during Portuguese rule
    • Mission: Spread and restore Christianity among settlers

    Death and Relics

    • Died in 1552 on Shangchuan Island (off China)
    • Body brought to Goa in 1554
    • Mortal remains preserved in the Basilica of Bom Jesus since 1624
    • Considered “incorruptible” as it showed minimal decay

    Religious and Cultural Significance

    • Revered as “Goencho Saib” (Lord of Goa)
    • Central figure in Goan Catholic identity
    • Associated with pilgrimage tourism and heritage

    Exposition of St Francis Xavier

    • Held once every 10 years
    • Relics are displayed for public veneration
    • Duration: Around 45 days
    • Relics moved to Se Cathedral

    Historical Context

    • Goa was a Portuguese colony during his arrival
    • Linked to spread of Christianity in India
    • His role is sometimes debated in relation to the Goa Inquisition
    [2021] Consider the following statements: 
    1 St. Francis Xavier was one of the founding members of the Jesuit Order. 
    2 St. Francis Xavier died in Goa and a church is dedicated to him there. 
    3 The Feast of St. Francis Xavier is celebrated in Goa each year. 
    Which of the statements given above are correct? 
    (a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3

  • CAR T-Cell Therapy Breakthrough for Solid Tumours

    Why in the News?

    A recent study published in the journal Science has reported a breakthrough in CAR T-cell therapy, where scientists developed a highly sensitive receptor capable of detecting faint tumour signals, potentially enabling treatment of solid cancers such as kidney and ovarian cancer.

    What is CAR T-cell Therapy (Chimeric Antigen Receptor T-cell Therapy)?

    • A form of immunotherapy where a patient’s T-cells are genetically modified to identify and destroy cancer cells

    Existing Limitation

    • Effective mainly in blood cancers like leukemia and lymphoma
    • Limited success in solid tumours due to
      • Antigen Heterogeneity
        • Tumour cells vary in protein expression
        • Some cells remain undetectable to CAR T-cells

    Note: An antigen is any substance—such as bacteria, viruses, toxins, or foreign proteins—that causes the immune system to produce antibodies or mount a specific defense response

    Key Discovery

    • Target protein: CD70
    • Found in
      • 70 to 80 percent of kidney and ovarian cancers
      • Around 25 percent of pancreatic cancers
    • Many tumour cells thought to lack CD70 actually contain it in very low quantities

    New Innovation

    HIT Receptor (HLA Independent T-cell Receptor): engineered immune receptors that enable T cells to target cancer cells without requiring HLA matching.

    • Detects very low levels of tumour antigens
    • Works by linking detection directly to the natural T-cell activation pathway
    • Bypasses the HLA system

    Results of Study

    • Conventional CAR T-cells failed to eliminate all tumour cells
    • HIT receptor based T-cells:
      • Eliminated hidden tumour cells
      • Achieved complete tumour removal in experimental models

    Safety Concerns

    • High sensitivity may attack normal cells
    • Known as Goldilocks Challenge
    • CD70 mostly absent in vital organs like Heart, Lungs, and Brain
    • Minor effects observed in immune cells
    [2022] Which one of the following statements best describes the role of B cells and T cells in the human body? 
    (a) They protect the body from environmental allergens. 
    (b) They alleviate the body’s pain and inflammation. 
    (c) They act as immunosuppressants in the body. 
    (d) They protect the body from the diseases caused by pathogens.

  • Light Pollution Threatens the World’s Clearest Skies

    Why in the News

    Rising Light Pollution and proposed energy projects have raised concerns about the degradation of the pristine night skies in the Atacama Desert, one of the world’s most important hubs for astronomical research.

    What is Light Pollution

    • Light pollution refers to excessive or misdirected artificial light that brightens the night sky and interferes with astronomical observations and ecosystems.

    Key Facts

    • The Atacama Desert is located in Chile
    • Known as the driest place on Earth
    • Receives over 300 clear nights per year
    • High altitude often exceeding 3000 metres
    • Covers around 105000 sq km

    Why is Atacama ideal for Astronomy?

    • Extremely dry climate reduces atmospheric disturbance
    • High altitude ensures clearer observation
    • Minimal light pollution due to isolation
    • Hosts some of the world’s largest ground based telescopes

    Major Astronomical Facilities

    • European Southern Observatory operates key observatories
    • Paranal Observatory is a major site
    • Extremely Large Telescope
      • Cost about 1.5 billion dollars
      • Expected completion by 2030
      • Features 798 mirrors
      • Around 20 times more powerful than current telescopes
    • Compared with Hubble Space Telescope
      • Around 15 times sharper resolution
    [2017] What is the purpose of ‘evolved Laser Interferometer Space Antenna (eLISA)’ project? 
    (a) To detect neutrinos 
    (b) To detect gravitational waves 
    (c) To detect the effectiveness of missile defence system 
    (d) To study the effect of solar flares on our communication systems

  • Google AI Data Centre Hub in Andhra Pradesh

    Why in the News

    A major Artificial Intelligence Data Centre Hub is being launched by Google in Andhra Pradesh, with the foundation stone laid by Chief Minister N. Chandrababu Naidu at Tarluvada near Visakhapatnam on April 28, 2026. It is one of the largest Foreign Direct Investment (FDI) projects in India’s digital infrastructure sector.

    Key Facts

    • Total Investment: 15 billion dollars (1.35 lakh crore rupees)
    • Implemented by Raiden Infotech in partnership with Adani Group
    • Total Land Area: 601.4 acres
    • Locations:
      • Rambilli (Anakapalli district)
      • Adavivaram and Tarluvada (Visakhapatnam district)

    Technical Features

    • Initial Power Capacity: 1 Gigawatt (GW)
    • Scalability: Up to 5 Gigawatt (GW)
    • Key infrastructure:
      • Submarine Cable Landing Stations
      • Dedicated Fibre Networks
    • Purpose: Low Latency Global Connectivity for AI and data operations
    [2020] With reference to Foreign Direct Investment in India, which one of the following is considered its major characteristic? 
    (a) It is the investment through capital instruments essentially in a listed company. 
    (b) It is a largely non-debt creating capital flow. 
    (c) It is the investment which involves debt-servicing. 
    (d) It is the investment made by foreign institutional investors in the Government securities.

  • India–New Zealand Free Trade Agreement (FTA)

    Why in the News?

    India has signed a Free Trade Agreement with New Zealand in 2025. The agreement is being highlighted as one of the fastest negotiated FTAs by India and is expected to come into force after ratification by the New Zealand Parliament. It reflects India’s push for deeper global trade engagement and supply chain diversification.

    What is a Free Trade Agreement (FTA)

    • A Free Trade Agreement is a pact between countries to reduce or eliminate tariffs and other trade barriers on goods and services, thereby promoting trade and investment.

    Key Features of the Agreement

    • New Zealand will eliminate tariffs on all goods imported from India.
    • India will remove or reduce tariffs on about 95 percent of imports from New Zealand.
    • The agreement was signed by Commerce Minister Piyush Goyal and his New Zealand counterpart.

    Tariff Structure

    • Immediate elimination
      • Wood and wool
      • Raw leather hides
    • Phased elimination
      • Petroleum oils
      • Vegetable oils
      • Electrical machinery
    • Tariff reduction
      • Wine
      • Pharmaceuticals
      • Iron, steel and aluminium products

    Sensitive Sector Exclusions

    India has excluded several key sectors to protect domestic interests

    • Dairy products such as milk, cheese and yoghurt
    • Agricultural items like onion, pulses, corn and almonds
    • Sugar and artificial honey
    • Copper and aluminium products
    • Animal products except sheep meat

    Trade and Investment Aspects

    • India’s exports to New Zealand reached 711.1 million dollars in 2024 to 25
    • Imports from New Zealand reached 587.1 million dollars
    • New Zealand has committed to facilitate 20 billion dollars investment in India over 15 years

    Additional Provisions

    • Mobility for students and skilled professionals
    • Boost to services such as IT, education, healthcare and engineering
    • Support for MSMEs, farmers and manufacturing sectors
    [2017] ‘Broad-based Trade and Investment Agreement (BTIA)’ is sometimes seen in the news in the context of negotiations held between India and: 
    (a) European Union 
    (b) Gulf Cooperation Council 
    (c) OECD 
    (d) SCO

  • [27th April 2026] The Hindu OpED: Summer as a source of income shock for gig workers

    PYQ Relevance[UPSC 2024] What is disaster resilience? How is it determined? Describe various elements of a resilience framework.Linkage: The PYQ is directly relevant as heatwaves represent a climate-induced disaster, where resilience must include income security and labour protection, not just survival. The article highlights gaps in India’s resilience framework by showing how gig workers remain excluded from economic and institutional preparedness systems.

    Mentor’s Comment

    India is experiencing more frequent and prolonged heatwaves, with recorded heat-related mortality in 2022. Simultaneously, the gig economy is expanding rapidly, 7.7 million workers (2020-21) projected to reach 23 million by 2029-30 (NITI Aayog). This creates a convergence where climate risk intersects with informal labour vulnerability; exposing gig workers to both health risks and income shocks.

    Why are heatwaves emerging as an income shock for gig workers?

    1. Income dependency: Earnings depend on trips/orders completed; reduced mobility lowers income.
    2. Heat-induced productivity loss: High temperatures slow movement and increase fatigue.
    3. Absence of paid leave: Gig workers lack paid leave; logging off results in immediate income loss.
    4. Health risks: Dehydration, heat exhaustion, long-term stress increase during peak hours.
    5. Structural vulnerability: Gig workers cannot “work from home,” unlike salaried employees.

    How has climate risk for labour been historically mischaracterized?

    1. Medical framing: Heat treated primarily as a public health emergency, not an economic issue.
    2. Policy limitation: Heat Action Plans focus on mortality reduction, not income protection.
    3. Behavioural advisories: Recommendations (stay indoors, reduce activity) unrealistic for gig workers.
    4. Neglect of informal sector: Assumption that individuals can adjust behaviour independently.

    Why does current preparedness remain inadequate for gig workers?

    1. Infrastructure mismatch: Cooling centres, water kiosks not designed for mobile workers.
    2. Fragmented governance:
      1. Health departments focus on illness
      2. Disaster agencies focus on emergency response
      3. Labour departments lack clarity on gig worker status
    3. Platform exclusion: Digital platforms not integrated into climate preparedness frameworks.
    4. Gender dimension: Women gig workers face additional unpaid care burdens and safety risks.

    How does extreme heat exacerbate economic inequality and labour precarity?

    1. Income volatility: Heat reduces working hours and this leads to a direct fall in earnings.
    2. Lack of social protection: Absence of insurance, wage guarantees, or compensation.
    3. Urban dependence: Cities rely on gig workers for essential services (food, medicines).
    4. Risk transfer: Platforms shift operational risks to workers without safety nets.

    What policy gaps hinder effective climate-labour integration?

    1. Regulatory ambiguity: Gig workers classified outside traditional labour protections.
    2. Limited labour codes applicability: Social security provisions remain weakly implemented.
    3. Platform accountability gap: No binding obligations for heat-responsive work design.
    4. Weak inter-agency coordination: Lack of integrated climate-labour governance framework.

    What measures can enhance resilience for gig workers?

    1. Labour recognition: Heat treated as labour and productivity issue.
    2. Workplace safeguards: Rest breaks, shaded areas, hydration facilities mandated.
    3. Income protection mechanisms: Insurance, wage compensation, integration with welfare schemes.
    4. Platform responsibility:
      1. Flexible performance metrics
      2. Reduced delivery pressure during peak heat
    5. Institutional coordination: Collaboration among labour, urban, disaster management, and platform regulators.

    Why is rethinking resilience critical in the gig economy context?

    1. Urban system dependence: Essential goods delivery depends on the gig workforce.
    2. Climate risk absorption: Gig workers act as buffers for systemic shocks.
    3. Resilience definition: Must include safe working conditions + stable income, not just survival.

    Conclusion

    Climate adaptation in India remains incomplete without integrating labour and income dimensions. Gig workers represent a critical but vulnerable workforce. Policy must shift from reactive health responses to proactive economic safeguards, ensuring both livelihood security and climate resilience.

  • Why below average-rains don’t rule out flood threats

    Why in the News?

    India’s monsoon narrative is undergoing a structural shift: even below-average seasonal rainfall (92% of normal) no longer guarantees safety from floods. The real concern is the sharp rise in short-duration, high-intensity rainfall events, with extreme rainfall incidents increasing to 181 in 2024 (from 160 in 2023). This marks a decisive break from earlier patterns where floods were linked to overall excess rainfall.

    Why do below-average monsoons no longer reduce flood risks?

    1. Rainfall variability: Seasonal averages conceal intra-seasonal fluctuations, allowing extreme events despite overall deficit rainfall.
    2. Short-duration intensity: Rainfall now occurs in short, intense bursts, increasing runoff and flood risk.
    3. Historical evidence: Major disasters (e.g., 2015 Chennai floods, 2018 Kerala floods, 2023 Himachal floods) occurred even in relatively normal or deficit rainfall years.

    How has the frequency and intensity of extreme rainfall changed over time?

    1. Rising frequency: Extreme rainfall events increased from ~89 (2016) to 181 (2024).
    2. Threshold revision: IMD reduced extreme rainfall threshold from 244.5 mm to 204.5 mm (2016), reflecting changing climate patterns.
    3. Spatial spread: Events are now geographically widespread, affecting both coastal and inland regions.

    What explains the increasing unpredictability of rainfall patterns?

    1. Climate change impact: Warmer atmosphere holds more moisture, leading to intense precipitation events.
    2. Chaotic weather systems: Small initial changes lead to large deviations, limiting forecast accuracy.
    3. Forecast limitations: Even with improved models, predicting exact rainfall intensity (250 mm vs 500 mm) remains difficult.

    Why are Indian cities increasingly vulnerable to rainfall-induced disasters?

    1. Urban flooding: Cities like Delhi, Mumbai, Chennai, Bengaluru face repeated flooding due to poor drainage systems.
    2. Unplanned development: Construction on floodplains, wetlands, and water bodies reduces natural absorption capacity.
    3. Population density: High-density urban clusters amplify economic and human losses.

    What role do past disasters play in understanding current risks?

    1. Disaster clustering: India has experienced at least one major rainfall disaster every year since 2013 (e.g., Kedarnath 2013, Uttarakhand 2021, Assam 2022).
    2. Record-breaking events:
      1. Jammu & Kashmir (2014): Highest rainfall in 100 years.
      2. Kerala (2018): Worst floods in a century.
    3. Trend shift: Disasters are no longer rare but structural features of the monsoon system.

    How has the nature of rainfall-related disasters evolved?

    1. From scarcity to extremes: Earlier focus on rainfall deficiency has shifted to extreme variability.
    2. Urban-centric risks: Flooding increasingly affects urban agglomerations rather than only rural areas.
    3. Economic consequences: States spent over 55% of disaster expenditure on floods (2019-2023), indicating high fiscal burden.

    Conclusion

    India’s monsoon is no longer defined by total rainfall but by distribution, intensity, and timing. The growing disconnect between seasonal averages and disaster outcomes highlights the urgent need for climate-resilient urban planning, improved forecasting systems, and adaptive governance frameworks. The challenge lies not in managing scarcity alone, but in navigating climate-induced volatility.

    PYQ Relevance

    [UPSC 2020] Account for the huge flooding of million cities in India including the smart ones like Hyderabad and Pune. Suggest lasting remedial measures

    Linkage: Increasing extreme rainfall events despite normal/below-normal monsoon directly explain rising urban flooding trends in Indian cities. This PYQ links climatology (monsoon variability) with urban geography issues, making it relevant for both Mains (GS1/GS3) and Prelims (extreme rainfall, IMD classification).

  • Rupee depreciation and its impact on investments

    Why in the News?

    The issue of rupee depreciation has gained renewed attention due to a sharp and sustained fall in the Indian Rupee (INR) against the US Dollar, with the currency weakening from ₹85.53 (March 31, 2025) to ₹92.76 (March 30, 2026). This is a notable 8.45% depreciation, and even 10.73% from intermediate peaks. This is significant because it reflects macroeconomic stress combined with global volatility, particularly rising crude oil prices and foreign investor outflows.

    How does rupee depreciation impact equity investments?

    1. Limited Direct Impact: Exchange rate fluctuations do not directly affect domestic equity investments if earnings are INR-based.
    2. Sentiment Effect: Currency weakness negatively affects investor confidence due to macroeconomic uncertainty.
    3. Multiple Drivers: Market corrections arise from FPI outflows, crude oil prices, and global cues, not just currency depreciation.

    Why is rupee depreciation more harmful to debt investments?

    1. Imported Inflation: Weak currency raises the cost of imports like crude oil, increasing inflation.
    2. Interest Rate Sensitivity: Higher inflation leads to higher interest rates, reducing bond prices.
    3. Example: Rising crude prices denominated in USD increase landed cost-inflation rises-bond yields rise and finally bond prices fall.

    What is the role of RBI projections in assessing currency impact?

    1. Inflation Projection: RBI projects 4.6% inflation for 2026-27, indicating moderate inflation expectations.
    2. Policy Assumptions: Includes crude oil at $85/barrel and exchange rate at ₹94/USD.
    3. Market Stability Signal: Suggests depreciation is partly already factored into macroeconomic planning.

    Can gold act as an effective hedge against rupee depreciation?

    1. Currency Hedge: Gold prices rise in INR when rupee weakens, as it is priced in USD.
    2. Historical Trend: A significant portion of gold price rise in India is due to currency depreciation.
    3. Portfolio Allocation: Recommended allocation is 10-15%, as gold is not a primary growth asset.

    How can investors benefit from global diversification during depreciation?

    1. Currency Advantage: Investments in foreign assets gain when INR depreciates.
    2. Conversion Benefit: Investment in USD assets appreciates in INR terms during redemption.
    3. Investment Routes:
      1. Mutual Funds: International funds available in India
      2. Direct Investment: Through Liberalized Remittance Scheme (LRS)

    How does rupee depreciation affect household expenses?

    1. Inflation Impact: Reduced purchasing power due to rising prices.
    2. Imported Goods: Costlier fuel, electronics, and foreign services.
    3. Limited Control: Domestic inflation due to global factors remains beyond individual control.

    Conclusion

    Rupee depreciation is not inherently negative but becomes problematic when it fuels inflation and destabilizes investment returns. While equity markets absorb the shock through multiple factors, debt markets and consumption are more vulnerable. Strategic diversification, moderate gold allocation, and global exposure can mitigate risks.

    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: Rupee depreciation increases imported inflation, which contributes to persistent food inflation in India. The article explains exchange rate pass-through and highlights the RBI’s inflation projection of 4.6%, indicating the role of monetary policy in managing inflationary pressures.

  • Hindu Kush Himalaya (HKH) 

    Why in the News?

    • A report by the International Centre for Integrated Mountain Development highlights a record 27% decline in snow persistence in the HKH region.
    • Indicates accelerating climate change impacts on Asian water systems.

    About Hindu Kush Himalaya (HKH)

    • A vast mountain system extending about 3,500 km
    • Spans 8 countries: Afghanistan, Bangladesh, Bhutan, China, India, Nepal, Myanmar, and Pakistan.

    Why Called “Third Pole”?

    • Largest ice reserves outside Arctic and Antarctic
    • Critical for:
      • Global climate regulation
      • Freshwater supply

    Major Rivers Originating from HKH

    • Indus
    • Ganga
    • Brahmaputra
    • Amu Darya
    • Mekong
    • Yangtze
    • Yellow River
    • Irrawaddy
    • Salween
    • Tarim
    [2012] When you travel in Himalayas, you will see the following: 
    1 Deep gorges 
    2 U-turn river courses 
    3 Parallel mountain ranges 
    4 Steep gradients causing land sliding 
    Which of the above can be said to be the evidence for Himalayas being young fold mountains? 
    (a) 1 and 2 only (b) 1, 2 and 4 only (c) 3 and 4 only (d) 1, 2, 3 and 4

  • Right to Safe Roads as a Part of Right to Life: Supreme Court Judgment

    Why in the News?

    In a significant expansion of fundamental rights, the Supreme Court of India ruled in August 2025 that access to safe, motorable, and well-maintained roads is an integral part of the Right to Life under Article 21 of the Constitution.

    Key Legal Pronouncements

    The Bench, comprising Justices J.B. Pardiwala and R. Mahadevan, linked the quality of infrastructure to constitutional guarantees:

    • Article 21 (Right to Life): The Court held that “life” is not merely physical existence but includes the right to live with dignity, which is hindered by poor and unsafe road conditions.
    • Article 19(1)(d): The right to move freely throughout the territory of India is a basic right. The Court noted that this right becomes “illusory” if the state fails to provide motorable roads.
    • State Responsibility: The judgment explicitly stated that it is the mandatory responsibility of the State to develop and maintain roads under its control.

    Case Background

    The ruling emerged from a dispute between Umri Pooph Pratappur (UPP) Tollways Private Limited and the Madhya Pradesh Road Development Corporation Limited (MPRDC).

    • The Project: A ‘Build, Operate, and Transfer’ (BOT) agreement for a 43.7-km road project in Madhya Pradesh worth ₹73.68 crore.
    • The Shift: While the case was a commercial dispute over a concession agreement, the Court used the platform to emphasize the public interest aspect of infrastructure.
    [2019] Which Article of the Constitution of India safeguards one’s right to marry the person of one’s choice? 
    (a) Article 19  
    (b) Article 21  
    (c) Article 25  
    (d) Article 29

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