The UPSC Blog · GS Paper III
GS Paper III: Economy, environment, S&T, security
Everything on the blog that serves GS Paper III — the economy, environment and ecology, science and technology, disaster management and internal security — concept first, latest official data second. Read the official GS Paper III syllabus · UPSC's GS Paper III questions since 2016.
Static notes
GST Council (Article 279A): Composition, Voting and Cooperative Federalism — UPSC Notes
The GST Council is the constitutional body, created by the 101st Amendment, that recommends GST rates, laws and rules for the Centre and the States. Its composition, weighted voting, the Mohit Minerals ruling, Next-Gen GST and the federal debates — with PYQs, MCQs and Mains practice.
· 11 min read
Demographic Dividend in India: Meaning, Window of Opportunity and the Jobs Challenge — UPSC Notes
India's demographic window opened around 2005–06 and may last till about 2055–56, but the dividend is only a potential. Dependency ratio, demographic transition, the jobs test from PLFS 2025, the South–North gap and how to write it in GS1 and GS3, with PYQs and MCQs.
· 10 min read
Current-affairs explainers
Economics Nobel 2026 and India’s Inflation: Hall, Woodford, Inflation Targeting and the RBI Hike
Robert Hall and Michael Woodford won the 2026 Economics Nobel as India's CPI inflation hit 5.54%. What they showed, how the RBI's inflation targeting works, CPI vs WPI, and how to use it in GS3.
· 7 min read
RBI Repo Rate Now 5.5%: Calibrated Tightening, Tighter Daily CRR, 5.54% Inflation and the Next MPC
The RBI raised the repo rate by 25 basis points to 5.5% and switched to ‘calibrated tightening’. Since then inflation has risen to 5.54% and the rupee is near its record low. What it means for the December MPC, with CRR vs SLR, PYQs and practice questions.
· 10 min read
Nobel Prize in Physics 2026: Francis Halzen, IceCube and the Discovery of Cosmic Neutrinos
Francis Halzen won the 2026 Nobel Prize in Physics for IceCube and the discovery of high-energy cosmic neutrinos. What neutrinos are, how a cubic kilometre of Antarctic ice detects them, India's INO, and the Prelims traps to avoid.
· 6 min read
Ramappa Temple and the Coal Mine Row: Why a UNESCO World Heritage Site Needs More Than a 300-Metre Buffer
Heritage groups want the Centre to drop a proposed opencast coal mine about 5 km from the Ramappa Temple in Telangana. What makes the Kakatiya temple special, how the World Heritage system and India's AMASR Act protect it, and how to use the issue in GS1 and GS3.
· 6 min read
Great Nicobar Project: Why the Supreme Court Let the Forest Rights Challenge Go On — Strategy, Ecology and the Shompen
The Supreme Court has refused the Centre's plea to stay a Calcutta High Court case that challenges the ₹72,000-crore Great Nicobar project under the Forest Rights Act. What the project includes, why the island matters strategically and ecologically, who the Shompen are, and how to use the case in GS2 and GS3.
· 6 min read
India’s Nuclear Doctrine: No First Use, Credible Minimum Deterrence and the Review Debate — UPSC Notes
A growing debate argues that India’s two-decade-old nuclear doctrine needs periodic review given China-Pakistan alignment and new military technologies — without abandoning No First Use or credible minimum deterrence. The doctrine’s pillars, its origins and the UPSC angle.
· 8 min read
Why Karnataka Rejected the Western Ghats ESA Draft: Gadgil vs Kasturirangan Explained
Both Houses of the Karnataka Legislature unanimously rejected the seventh draft notification on the Western Ghats Ecologically Sensitive Area and sought a year for a village-by-village survey. What the draft proposes, Karnataka’s objections, Gadgil vs Kasturirangan, and how UPSC tests it.
· 6 min read
India’s Forex Reserves in 2026: From a Record $785.7 Billion to a Record Weekly Fall — RBI Bulletin and the West Asia Oil Shock
India’s forex reserves peaked at $785.7 billion in early September 2026 and fell to $747.5 billion by month-end as the RBI defended the rupee through the West Asia oil shock. Components, adequacy benchmarks, the RBI bulletin’s resilience case and UPSC practice.
· 6 min read
UPI MDR Deferred Until After Diwali: The 0.4% Merchant Charge, Who Pays and the Supreme Court Case
NPCI has deferred the 0.4% MDR on UPI payments to merchants above ₹2,000 until after Diwali, so UPI stays free for now. What MDR is, who decides, what stays free, the Supreme Court challenge and the UPSC angle.
· 8 min read
AFSPA Explained: Disturbed Areas, Supreme Court Safeguards and the October 2026 Extension
AFSPA in one page: who declares a disturbed area, what the armed forces can do, the Supreme Court safeguards, the reform debate and where it applies after the October 2026 extension, with a process graphic, a timeline, MCQs and Mains questions.
· 8 min read
Monsoon 2026: Why Odisha Got Excess Rain When India Was Deficient — Bay of Bengal Low-Pressure Systems Explained
India's 2026 southwest monsoon ended 12.6% below normal, yet Odisha was the only meteorological subdivision with excess rain, 29% above normal. How Bay of Bengal low-pressure systems explain the contrast, how IMD classifies them, and how to use the season in GS1 and GS3.
· 6 min read