UPSC Mains 2026 GS1 Q17: model answer
Analyze the major drivers of human-induced land-use changes in India and their geographical consequences.
What the question wants
Identify drivers (agriculture, urbanisation, infrastructure, mining, forests) and link each to geographical consequences (ecology, hydrology, climate, society).
How to structure it
Intro: land-use change and data. Body: drivers; consequences; regional examples. Conclusion: land-use planning.
- 1Drivers
- 2Consequences
- 3Regional examples
Model answer
Land use describes how people use land: farms, forests, settlements, industry. In India, rising population and growth are changing it fast.
- Urban sprawl over lakes and wetlands
- Paved catchments: rain cannot soak in
- Choked or missing storm drains
- Faster, bigger runoff peaks
Major drivers
- Urban expansion: cities grow into farmland and wetlands; Bengaluru lost much of its lake area.
- Infrastructure: expressways, industrial corridors, dams.
- Agricultural change: canal irrigation, shift to water-hungry crops, and conversion of grazing commons.
- Mining: coal and iron ore belts of Jharkhand, Odisha, Chhattisgarh.
- Forest diversion: for projects; also plantations replacing natural forests.
- Tourism in hill states.
Geographical consequences
- Hydrology: paved surfaces cause urban floods (Chennai 2015, Bengaluru 2022); groundwater decline in Punjab.
- Soil and land degradation: ISRO's atlas shows nearly a third of land degraded.
- Climate: urban heat islands; loss of carbon sinks.
- Biodiversity: fragmented habitats, human-animal conflict (elephants in Odisha, leopards near Mumbai).
- Hazards: slope cutting raises landslide risk (Joshimath, Wayanad).
- Society: displacement of tribal and farming communities.
Way forward: a national land-use policy with zoning, wetland protection, cumulative EIA, compact cities and green corridors. The Bhuvan land-use maps give planners the data; they need the will to use it.
Keywords, cases and data to drop in
land degradation urban heat island habitat fragmentation cumulative EIA land-use zoning
Where most answers lose marks
- Listing drivers without consequences
- No Indian examples
Same theme in Prelims
Which of the following statements about Rare Earth Elements (REEs) and Critical Minerals is/are correct ?
- 1. Modern technological innovations including Artificial Intelligence, robotics and space exploration extensively utilise Rare Earth Elements (REEs).
- 2. China has the highest share in mining of REEs followed by India.
- 3. The Government of India launched the National Critical Mineral Mission (NCMM) in 2025 to establish a robust framework for self-reliance in the critical mineral sector.
- 4. Rare Earth Elements are a set of 13 metallic elements.
Select the answer using the code given below :
Answer (a) & explanation
Statements 1 and 3 are correct (a). Statement 1 is right: REEs are used in magnets, chips, batteries and satellites for AI, robotics and space. Statement 3 is right: the National Critical Mineral Mission was approved in January 2025 for self-reliance. Statement 2 is wrong: China leads mining by far, but the next producers are the USA, Myanmar and Australia, not India. Statement 4 is wrong: there are 17 rare earths, the 15 lanthanides plus scandium and yttrium. So options (b), (c) and (d) fail.
Notice India's position: it has about 6% of world REE reserves, mainly in monazite beach sands of Kerala, Odisha and Tamil Nadu, mined by IREL. China also controls most REE processing.
Answer as per the official UPSC answer key.
Which of the following statements with regard to Green Hydrogen is/are correct ?
- 1. It is decarbonized hydrogen obtained from natural gas reforming combined with carbon capture and storage (CCS).
- 2. It is produced using electrolysis of water with electricity generated by renewable energy.
- 3. National Green Hydrogen Mission of India aims for abatement of nearly 50 MMT of annual greenhouse gas emissions by 2030.
Select the answer using the code given below :
Answer (b) & explanation
Statements 2 and 3 are correct (b). Statement 2 is right: green hydrogen comes from splitting water by electrolysis, using renewable power. Statement 3 is right: the National Green Hydrogen Mission (2023) targets 5 MMT of green hydrogen a year by 2030 and about 50 MMT of avoided CO₂-equivalent emissions each year. Statement 1 is wrong: hydrogen from natural gas with carbon capture is blue hydrogen. So options (a), (c) and (d) fail.
Notice the colours: grey hydrogen from gas without capture (most hydrogen today), brown from coal, and pink from nuclear power. The mission's SIGHT programme supports electrolyser making. Uses include fertilisers, refineries, steel and shipping fuel.
1 says "decarbonized", which sounds green. Gas with CCS is blue.
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Answer as per the official UPSC answer key.
Which of the following statements in relation to NIRANTAR (National Institute for Research and Application of Natural Resources to Transform, Adapt and Build Resilience), a platform of institutions under the Ministry of Environment, Forest and Climate Change, is/are correct ?
- 1. Ecosystem Survey and Analysis is a vertical under this platform, the lead institute of which is Botanical Survey of India, Kolkata.
- 2. Research and Management of Ecosystem Service is a vertical under this platform, the lead institute of which is Central Zoo Authority, New Delhi.
- 3. Capacity Development Support is a vertical under this platform, the lead institute of which is Indian Institute of Forest Management, Bhopal.
Select the answer using the code given below :
Answer (b) & explanation
Statements 1 and 3 are correct (b). NIRANTAR groups the Environment Ministry's institutes into verticals. Statement 1 is right: Ecosystem Survey and Analysis is led by the Botanical Survey of India, Kolkata, with bodies like the FSI and ZSI. Statement 3 is right: Capacity Development Support is led by the Indian Institute of Forest Management, Bhopal. Statement 2 is wrong: Research and Management of Ecosystem Service is led by ICFRE, Dehradun; the Central Zoo Authority is only a member. So options (a), (c) and (d) fail.
Notice the purpose: pooling institutes avoids duplicate work and links research to climate adaptation and resilience. Other Ministry bodies include the Wildlife Institute of India (Dehradun) and GBPNIHE for the Himalaya.
the Central Zoo Authority does sit in that vertical, but as a member, not the lead.
Answer as per the official UPSC answer key.
Fresh examples from current affairs
CAQM flying squads find 17 road-dust violations along Delhi’s Ring Road
On 3 October 2026 four CAQM flying squads inspected 25 stretches, about 35 km, of Delhi's Inner and Outer Ring Road managed by PWD. They found 17 violations of heavy visible road dust and construction and demolition waste. CAQM directed agencies to clean roads regularly to stop traffic from lifting dust back into the air.
UPSC angle: Prelims: CAQM, pollution sources. · Mains GS-III: urban air pollution.
4 Oct 2026
Domestic Tourism Expenditure Survey 2025-26: pilgrimage tops overnight trips
MoSPI released the Domestic Tourism Expenditure Survey, July 2025 to June 2026, on 23 September 2026. Pilgrimage and religious travel made up 48% of overnight trips over the last 365 days. Uttar Pradesh had the highest share of visitor-trips, 15.7%. Business trips had the highest average spend per trip, Rs. 5,949.
UPSC angle: Prelims: which agency runs DTES (NSO, MoSPI).
23 Sep 2026
Varuna Elevated Corridor: ₹10,998-crore, 43.2-km road project for Varanasi
The Varuna Elevated Corridor, approved by the Union Cabinet in July 2026, is a ₹10,998-crore, 43.218-km road along the Varuna river in Varanasi. It will link NH-31 with the Varanasi Ring Road. NHAI will build it, with a cable-stayed bridge. Travel time from NH-31 to Kashi Railway Station should fall from about 40 to 20 minutes.
UPSC angle: Mains: Balancing heritage conservation and urban infrastructure.
15 Sep 2026
PM SVANidhi restructured: lending extended to 2030, 1.15 crore vendors targeted
PM SVANidhi, the collateral-free loan scheme for urban street vendors launched on 1 June 2020, completed one year of its restructured phase on 27 August 2026. Lending now runs till 31 March 2030 for 1.15 crore vendors. In the first year, 21.86 lakh loans worth ₹6,294 crore went to 10.56 lakh new beneficiaries.
UPSC angle: Prelims: SVANidhi ministry, purpose.
27 Aug 2026Learn the concept
Question text as printed in the official UPSC question paper: https://www.upsc.gov.in/sites/default/files/QP-CSM-26-010926-GENERAL%20STUDIES%20PAPER%20-%20I.pdf The model answer is original Battle IAS work; use it to learn structure, not to memorise.