UPSC current affairs — 20 September 2026

The day's most exam-relevant stories, scored and mapped to the UPSC syllabus by ProjectsPilot's AI. Full Prelims/Mains/Interview analysis is inside the app.

PM-AJAY Accelerates Socio-Economic Development of Scheduled Caste Communities

PIB reports that the Ministry of Social Justice & Empowerment is implementing the PM-AJAY scheme to accelerate socio-economic development of Scheduled Caste communities. Funds were released under the Adarsh Gram and Grant-in-Aid components, supporting infrastructure development and livelihoods.

SocietyGS-II: Welfare schemes for vulnerable sections (SCs) and delivery mechanismsGS-II: Issues related to implementation of social justice initiativesPIB India

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Breathing in death: How mining dust in the Aravallis is killing residents

Mining and stone-crushing dust in Rajasthan’s Aravallis is linked to silicosis among residents and workers, causing deaths and chronic respiratory illness. The news highlights ongoing Supreme Court-linked review concerns about coverage of mining-affected areas and the pending final report.

EnvironmentGS-II: Issues relating to health and safety of workers; social justice implications of environmental harmGS-III: Environmental pollution and degradation; air quality and occupational healthThe Hindu · National +1 sources

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SEMICON India 2026 Concludes Successfully, Showcasing India’s Growing Role in the Global Semiconductor Ecosystem

SEMICON India 2026 concluded in New Delhi, highlighting India’s growing participation in the global semiconductor value chain. The 3-day event saw large international participation and multiple MoUs across design, manufacturing, packaging, R&D and talent.

Science & TechGS-II: Technology development and ecosystem-building initiatives (as part of governance of S&T)GS-III: Indigenisation and development of semiconductor/ICT ecosystem; research, manufacturing and talentPIB India

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When Swachhata Became a People’s Movement

PIB traces how rural sanitation shifted from toilet construction under SBM (2014) to sustaining outcomes through ODF Plus and solid/liquid waste management under SBM-Gramin Phase II. It highlights the village classification into Aspiring, Rising and Model for progress in sanitation and cleanliness.

EnvironmentGS-II: Welfare schemes—Swachh Bharat Mission and sanitation/behaviour changeGS-III: Environment and sanitation—solid and liquid waste management; open defecation and ODF/ODF PlusPIB India

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SEMICON India 2026 Day 2 Highlights India’s Semiconductor Journey from Ambition to Execution at Scale

SEMICON India 2026 Day 2 highlighted India’s semiconductor mission moving from intent to execution at scale. Focus areas include ISM 2.0 pillars—design, fabs/production ecosystem, ATMP/OSAT, R&D and talent—along with resilient supply chains and international partnerships.

Science & TechGS-II: Technology cooperation/partnerships (domestic capability building and global linkages)GS-III: Indigenous technology—semiconductor ecosystem, design/manufacturing, R&D, supply chainsPIB India +1 sources

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Early warning systems need alerts for non-rainfall triggers: climate scientist Tapio Schneider

Climate scientist Tapio Schneider argues that early warning systems for extreme weather must also trigger alerts from non-rainfall factors, not only rainfall. The piece highlights improving climate-linked disaster preparedness through broader monitoring and warning triggers.

EnvironmentGS-II: Preparedness and mitigation for disasters (early warning systems)GS-III: Climate change impacts and disaster risk reduction; hydrometeorological/forecasting systemsHindustan Times · India

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Govt rolls out GOBARdhan rules with CBG offtake

The government notified rules under the GOBARdhan scheme, with provisions enabling CBG (compressed biogas) offtake. This supports monetisation of organic waste through bioenergy value chains.

EnvironmentGS-II: Government policies on waste management and incentives (implementation rules)GS-III: Bioenergy/biogas, waste-to-energy and sustainable alternatives; management of organic wasteEconomic Times · Top Stories

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After October 1, only smaller 5 or 10 kg LPG refills await non-eKYC households

From October 1, non-eKYC households will lose access to subsidised 14.2 kg LPG refills and will instead get smaller 5/10 kg cylinders at applicable market (non-subsidised) prices. Aadhaar biometric authentication (BAA) becomes mandatory to continue subsidised domestic LPG refills.

EconomyGS-II: Welfare schemes—implementation issues and conditions for beneficiaries (LPG subsidy/eKYC linkage)GS-III: Indian Economy—reform in subsidy delivery mechanisms and pricing of essential commoditiesThe Hindu · Business

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Saudi Arabia confirms Yemen’s Houthi rebels tried to attack its capital with ballistic missile

Saudi Arabia says Yemen’s Houthi rebels attempted to attack Riyadh with a ballistic missile and also targeted civilian infrastructure in the Red Sea/Western regions, claims that were largely intercepted or thwarted. The incident highlights escalation in the Iran-backed Houthis’ conflict affecting regional security and shipping/energy routes.

International RelationsGS-II: Bilateral relations and global conflicts impacting IndiaGS-III: Security challenges in global shipping corridors and energy/transport disruptionThe Hindu · International

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