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Subject: Geography

  • Explain briefly the ecological and economic benefits of solar energy generation in India with suitable examples.

    India has emerged as a global leader in solar energy with over 140 GW of installed solar capacity (Nov 2025) and ranks 3rd in the world in solar capacity and generation.

    Ecological Benefits

    Carbon Sequestration

    By replacing coal-fired thermal power, which is the primary source of CO-2 emissions. Every 1 GW of solar power reduces CO2 emissions by approximately 1.5 million tonnes annually.

    Supports India’s NDC targets – 500 GW non-fossil capacity by 2030 and net-zero by 2070.

    Water Conservation – Use 95% less water than thermal power plants. Shifting to solar saves roughly 2.5 liters of water per kWh generated.

    Preservation of Fragile Ecosystems – Installing panels on reservoirs reduces water evaporation and algae growth. Eg- Omkareshwar Floating Solar Park (Madhya Pradesh).

    Agrivoltaic Biodiversity – “Solar farming” allows crops to grow beneath panels, creating a micro-climate that reduces soil moisture loss.

    Reduction Air Pollution – Unlike fossil fuels, solar generation releases zero SOx, NOx, or particulate matter (PM 2.5).

    Soil Reclamation – Solar parks built on saline or degraded “wastelands,” prevent further soil erosion. Eg- Khavda Hybrid Park in the Rann of Kutch

    Transition to Circular Economy – Eg- Draft Solar Waste Management Rules mandate recycling of end-of-life panels.

    Protection of Glacial Regions – Eg- Solar projects in Ladakh (13 GW planned) can reduce black carbon deposits on glaciers, which otherwise accelerate melting.

    Economic Benefits

    Cost Savings for Households – Solar tariffs are lower compared to coal based power.

    Reduction in Energy Import Bill – Solar energy helped India save roughly $4.2 billion in fuel costs in 2024-25, strengthening the Current Account Balance.

    Boost to Domestic Manufacturing (PLI Scheme) – Solar manufacturing capacity jumped from 38 GW to 74 GW in 2025, attracting ₹52,900 crore in fresh private investment.

    Agricultural Income Diversification- Under PM-KUSUM Component A, farmers can earn income by installing solar plants on unproductive land.

    Attraction of Global FDI – 100% FDI under the automatic route has made India a top destination for ESG-focused global funds.

    Rural Electrification – Solar micro-grids provide 24/7 power to remote villages where grid extension is expensive.

    Infrastructure Development – Mega solar parks bring roads, water, and connectivity to previously isolated regions.

    Export Potential– India exported $1.5 billion worth of solar equipment in 2025.

    Challenges in Solar Energy Generation

    Intermittency and Storage Gap- shortage of Battery Energy Storage Systems (BESS)

    Land Acquisition Hurdles for Mega-parks

    Lack of grid connectivity

    Import dependency- India still imports over 90% of its wafers and ingots from China.

    Limited recycling infrastructure creates a toxic waste risk (lead and cadmium).

    Poor Financial Health of DISCOMs- delayed payments to solar developers and deterring investment.

    Steps Taken by Governments

    PM-Surya Ghar- Muft Bijli Yojana to solarize 1 crore households by 2027

    Solar Park Scheme- A target of 40 GW across 50+ parks by March 2026.

    PM-KUSUM- Solarizing over 30 million irrigation pumps.

    PLI Scheme- to boost domestic manufacturing of high-efficiency solar modules

    A balanced strategy focusing on decentralised solar, grid expansion, storage systems, and region-specific planning is essential to achieve Panchamrit Targets.

  • How are climate change and the sea level rise affecting the very existence of many island nations? Discuss with examples.

    As per the IPCC, global mean sea level rose by 0.20 m between 1901 and 2018. It has projected a global mean SLR of 1.3 to 1.6 m by 2100 under the high-emission scenario.

    Permanent submergence of land – Eg- Kiribati has already seen two small uninhabited islets (Tebua Tarawa and Abanuea) disappear underwater.

    Coastal erosion – Wave action and storm surges remove shoreline. Eg- Shoreline retreat in the Maldives.

    Salinisation of freshwater lenses – Sea water enters groundwater and contaminates wells leading to drinking water shortage.

    Frequent flooding during high tides and storms can lead to large scale displacement. Eg- “King tide” flooding in Tuvalu.

    Damage to housing and public infrastructure – Eg- Majuro Airport in the Marshall Islands frequently faces flooding

    Loss of agriculture – Salinity affects soil fertility and traditional crops. Eg- Taro cultivation affected in Kiribati and Tuvalu.

    Coral reef degradation – Ocean warming and acidification damage reefs that act as wave barriers. Eg- Coral bleaching in Fiji and Maldives.

    Impact on fisheries – Changes in ocean temperature and reef systems reduce fish catch, impacting livelihood

    Climate-induced migration – Eg- Kiribati purchased land in Fiji for future resettlement.

    Way Forward

    Hard Engineering Measures

    Seawalls to block wave attack.

    Groynes – Trap sand and widen beaches. Eg- Puducherry groyne field.

    Breakwaters – Offshore barriers that reduce wave energy. Eg- Chennai port.

    Revetments – Sloped rock armour to absorb wave impact.

    Soft Engineering Measures

    Mangrove Restoration – Eg- MISHTI-based efforts in Sundarbans.

    Coral and Seagrass Restoration – Eg- Andaman reef rehabilitation.

    Integrated Coastal Zone Management (ICZM)

    Ecosystem-Based Coastal Planning – Combines geomorphology, ecology and socio-economic factors.

    Regulatory Tools (CRZ Norms) – no-development zones and hazard mapping reduce vulnerability.

    Early Warning SystemsINCOIS alerts for timely action.

    Strengthening coastal resilience and climate mitigation is essential to safeguard communities and advance SDG 13 (Climate Action) and SDG 14 (Life Below Water).

    Water

  • What are non-farm primary activities? How are these activities related to physiographic features in India? Discuss with suitable examples.

    Non-farm primary activities are those primary sector activities that involve the direct extraction or harvesting of natural resources other than crop cultivation.

    Major non-farm primary activities in India

    Mining

    Fishing and aquaculture

    Forestry and logging

    Animal husbandry and pastoralism

    Collection of minor forest produce

    Relation with physiographic features

    Mining – Concentration in plateau and mountain regions due to ancient crystalline rocks and sedimentary basins. Eg- Iron ore in Odisha-Jharkhand belt, coal in Damodar valley, bauxite in Eastern Ghats.

    Forestry – Dense forests grow in high relief and high rainfall areas. Eg- Coniferous forests in Himachal & Uttarakhand, tropical evergreen forests in Western Ghats.

    Animal Husbandry – Arid, Semi-Arid and Grassland Regions. Eg- Sheep rearing in Rajasthan, cattle in Gujarat, transhumance in Himalayas.

    Fishing – Coastal Plains and Riverine Regions. Eg- Marine fishing in Kerala & Gujarat, inland fisheries in Ganga-Brahmaputra plains, brackish water aquaculture in Andhra Pradesh and Chilika lake

    Minor Forest Produce in Central Indian Highlands and North-East hills. Eg- Tendu leaves in Madhya Pradesh, lac in Jharkhand.

    Horticulture and Plantation – Grows in hill slopes and high rainfall areas. Eg- Tea in Assam & Darjeeling, spices in Kerala.

    This reflects the intimate relationship between natural resource endowment and livelihood patterns, and highlights the need for region-specific, sustainable development strategies.


  • ⁠What are Tsunamis? How and where are they formed? What are their consequences? Explain with examples.

    A tsunami is a series of large ocean waves generated by the sudden displacement of a massive volume of water, usually due to undersea earthquakes, volcanic eruptions, landslides, or meteorite impacts.

    Tsunami Formation Process

    Tectonic Plate Movement – Occurs mainly at subduction zones where one plate sinks beneath another.

    Sudden Seafloor Displacement due to vertical uplift or subsidence of seabed

    Energy Transfer to Water Column leading to upward push.

    Wave Propagation in Deep Ocean – Waves travel at high speeds (up to 700-800 km/h) with low height.

    Wave Shoaling Near Coast – As depth decreases, wavelength decreases and height increases

    Consequences of Tsunamis

    Social Consequences

    Mass casualties – Over 2,30,000 deaths in 2004 Indian Ocean tsunami.

    Large-scale displacement – Millions displaced in Indonesia and Sri Lanka (2004).

    Health crises – Water-borne diseases in relief camps.

    Psychological trauma – Long-term PTSD among survivors in Japan (2011).

    Economic Consequences

    Infrastructure destruction – Ports, roads, airports damaged. Eg- Severe infrastructure loss in Fukushima (2011).

    Loss of livelihoods – Fisheries and tourism collapse.

    High reconstruction costs – Japan’s 2011 losses estimated over $200 billion.

    Environmental Consequences

    Coastal ecosystem damage – Eg- Coral reef degradation in Andaman & Nicobar (2004).

    Soil salinization – Agricultural lands turned infertile.

    Secondary disasters. Eg- Fukushima nuclear accident (2011).

    Groundwater Contamination- Saltwater and sewage penetrate freshwater aquifers

    While they cannot be prevented, early warning systems, ecological buffers, and resilient coastal planning can significantly reduce their human and economic toll.

  • Consider the following statements

    Consider the following statements:
    Tributary River – Main River
    1. Chambal: Narmada
    2. Sone: Yamuna
    3. Manas: Brahmaputra.

  • Consider the following statements

    Consider the following statements:
    1. Ajman is one of the seven Emirates of the UAE.
    2. Ras al-Khaimah was the last Sheikhdom to join the UAE.

  • Consider the following statements

    Consider the following statements:
    1. Chokmagalur is well-known for sugar production.
    2. Mandya is well-known as a coffee-production region.

  • Which of the following pairs is/are correctly matched

    Which of the following pairs is/are correctly matched?
    Theory/Law – Associated Scientist
    1. Continental Drift: Edwin Hubble
    2. Expansion of Universe: Alfred Wegener
    3. Photoelectric Effect: Albert Einstein.

  • Which of the following pairs are correctly matched

    Which of the following pairs are correctly matched?
    Irrigation Project – State
    1. Damanganga: Gujarat
    2. Girna: Maharashtra
    3. Pamba: Kerala.