Energy Resources in India: Types, Distribution, Renewable Energy and Conservation

Energy resources are natural or manufactured sources from which energy can be obtained for electricity generation, transportation, heating, industrial production and domestic use. Energy is fundamental to economic development, infrastructure, agriculture and modern lifestyles.

For UPSC, energy resources are important because the topic connects Indian Geography, Economy, Environment, Science & Technology, Energy Security and Climate Change.

What are Energy Resources?

Energy resources are sources that provide usable energy. They may be classified on the basis of their availability, origin, renewability and conventional use.

Major Categories

1. Non-renewable energy resources
   • Coal
   • Petroleum
   • Natural Gas
   • Nuclear fuels such as uranium and thorium
2. Renewable energy resources
   • Solar
   • Wind
   • Hydropower
   • Biomass
   • Geothermal
   • Tidal and wave energy

Important Concept

Renewable does not always mean completely pollution-free.

For example, solar and wind power have very low operational emissions, but their manufacturing, land use, transmission infrastructure, mining requirements and end-of-life waste can have environmental impacts.

Conventional and Non-Conventional Sources

The conventional/non-conventional classification is largely historical and usage-based, rather than a strict scientific classification.

Conventional Sources	Non-Conventional / Newer Energy Sources
Coal	Solar
Petroleum	Wind
Natural Gas	Tidal
Large-scale hydropower in traditional classifications	Geothermal
Widely used historically	Biomass and waste-to-energy
Mostly established technologies	Emerging/decentralised technologies

Important: Nuclear energy is not renewable, because uranium and other nuclear fuels are finite. However, nuclear power is generally classified as a low-carbon/non-fossil source of electricity.

Conventional Energy Resources

1. Coal

Coal remains an important source of energy for India’s electricity generation and industrial sectors, particularly thermal power, steel and cement.

Important Facts

• Indian coal deposits are mainly associated with the Gondwana and Tertiary geological formations.
• Major Gondwana coalfields are concentrated in eastern and central India.
• Important coalfields include:
  • Jharia
  • Raniganj
  • Bokaro
  • Giridih
  • North Karanpura
  • South Karanpura
  • Talcher
  • Korba
  • Singrauli
• Major coal-bearing regions are associated with the Damodar, Son, Mahanadi and Godavari river valleys.
• Tertiary coal occurs mainly in parts of Assam, Meghalaya, Arunachal Pradesh and Nagaland.
• Lignite deposits are important in Tamil Nadu, Gujarat, Rajasthan and Jammu & Kashmir.

Why is Coal Important for India?

• Base-load electricity generation
• Steel production
• Industrial heat
• Employment and regional development
• Energy security

Major Concerns

• Air pollution
• Greenhouse-gas emissions
• Land degradation
• Mine fires and subsidence
• Water pollution
• Rehabilitation of mining regions

2. Petroleum

Petroleum or crude oil is a mixture of hydrocarbons occurring mainly in sedimentary basins.

Uses

Petroleum is used for:

• Petrol and diesel
• Aviation fuel
• Lubricants
• Petrochemicals
• Synthetic fibres
• Plastics
• Pharmaceuticals
• Fertilisers and chemicals

Major Oil-Producing Regions of India

Assam

Important oil fields include:

• Digboi
• Naharkatiya
• Moran

Gujarat

Important areas include:

• Ankleshwar
• Kalol
• Mehsana

Western Offshore

• Mumbai High is one of India’s major offshore oil fields.

Eastern Offshore

Hydrocarbon resources are also associated with:

• Krishna-Godavari Basin
• Cauvery Basin

Petroleum Refining

India has a large and geographically diversified refining industry.

Two useful geographical concepts are:

• Field-based refineries: located close to oil-producing areas.
• Market-based refineries: located closer to major consumption and transport centres.

3. Natural Gas

Natural gas is a fossil fuel composed primarily of methane.

It is used for:

• Electricity generation
• Fertiliser production
• City gas distribution
• Industrial fuel
• Domestic cooking
• Petrochemical industries

Major Producing/Resource Regions

Natural gas resources occur in:

• Assam
• Gujarat
• Tripura
• Rajasthan
• Krishna-Godavari Basin
• Cauvery Basin
• Western and eastern offshore areas

Advantages

Natural gas generally produces lower CO₂ emissions per unit of electricity than coal.

Limitations

• It remains a fossil fuel.
• Methane leakage can significantly affect its climate impact.
• India remains dependent on imports for a substantial portion of its gas requirements.

Renewable Energy Resources

Renewable energy comes from sources that are naturally replenished on a human timescale.

Major sources include:

1. Solar
2. Wind
3. Hydropower
4. Biomass
5. Geothermal
6. Tidal
7. Wave energy

India’s Renewable Energy Status – 2026

India’s renewable-energy sector has expanded rapidly, particularly solar and wind power.

According to the Ministry of New and Renewable Energy, as of 31 August 2026:

Energy Source	Installed Capacity
Solar	168.04 GW
Wind	58.52 GW
Small Hydro	5.18 GW
Biomass Bagasse Cogeneration	9.82 GW
Biomass Non-Bagasse Cogeneration	1.05 GW
Waste-to-Energy	0.32 GW
Large Hydro	52.06 GW
Total Renewable Energy	295.55 GW
Nuclear	8.78 GW
Total Non-Fossil Capacity	304.33 GW

Large hydro is included in the renewable-energy total by MNRE, while nuclear is counted separately as a non-fossil source.

Key Observation

Solar has become India’s largest renewable-energy source by installed capacity, followed by wind and large hydropower.

1. Solar Energy

Solar energy is obtained by converting sunlight into useful energy.

Major Technologies

Solar Photovoltaic (PV)
Converts sunlight directly into electricity.

Solar Thermal
Uses solar radiation to produce heat.

Major Solar Regions

High solar potential is particularly associated with:

• Rajasthan
• Gujarat
• Ladakh
• Maharashtra
• Madhya Pradesh
• Andhra Pradesh
• Telangana
• Karnataka

India’s Solar Capacity

As of 31 August 2026, India’s installed solar capacity stood at approximately 168.04 GW.

This included:

• Ground-mounted solar: about 123.99 GW
• Grid-connected rooftop solar: about 32.59 GW
• Hybrid projects – solar component: about 4.83 GW
• Off-grid solar: about 6.63 GW

Important Solar Initiatives

• National Solar Mission
• Solar Parks
• PM Surya Ghar: Muft Bijli Yojana
• PM-KUSUM
• Rooftop Solar Programme
• International Solar Alliance

Challenges

• Intermittency
• Land requirements
• Grid integration
• Energy storage
• Solar-panel waste
• Dependence on imported components and critical minerals

2. Wind Energy

Wind turbines convert the kinetic energy of moving air into electricity.

Major Wind-Energy States

• Gujarat
• Tamil Nadu
• Karnataka
• Maharashtra
• Rajasthan
• Andhra Pradesh

India’s installed wind capacity reached approximately 58.52 GW by 31 August 2026.

Advantages

• Renewable
• Low operational emissions
• Suitable for utility-scale generation
• Can complement solar generation in some regions

Challenges

• Variable generation
• Land and transmission requirements
• Ecological concerns in sensitive areas
• Need for grid balancing and storage

Emerging Area: Offshore Wind

India has substantial offshore-wind potential, particularly along the Gujarat and Tamil Nadu coasts, although development remains more challenging and capital-intensive than onshore wind.

3. Hydropower

Hydropower converts the potential and kinetic energy of flowing or falling water into electricity.

Major Advantages

• Renewable
• Flexible generation
• Can provide peak-load support
• Important for grid balancing
• Pumped-storage hydropower can function as an energy-storage system

Major Regions

Hydropower potential is particularly significant in:

• Himalayas
• Northeast India
• Western Ghats

Major river systems include:

• Indus
• Ganga
• Brahmaputra

Challenges

• Displacement
• Ecological impacts
• Sedimentation
• Alteration of river flows
• Landslide and seismic concerns in some Himalayan areas

4. Tidal and Wave Energy

India has a long coastline and therefore possesses potential for marine energy.

Tidal Energy

Tidal energy uses the periodic rise and fall of sea levels.

Potential areas include:

• Gulf of Khambhat
• Gulf of Kachchh
• Sundarbans region

Wave Energy

Wave energy uses the movement of ocean waves to generate electricity.

Challenges

• High capital cost
• Difficult marine environment
• Corrosion
• Maintenance challenges
• Limited commercial deployment

5. Geothermal Energy

Geothermal energy uses heat from the Earth’s interior.

Potential geothermal locations in India include:

• Puga Valley, Ladakh
• Manikaran, Himachal Pradesh
• Tattapani, Chhattisgarh
• Cambay Basin, Gujarat

Uses

• Electricity generation
• Heating
• Industrial applications
• Geothermal heat pumps

India’s geothermal potential remains largely underdeveloped compared with solar and wind.

6. Biomass and Bioenergy

Biomass energy is produced from organic material such as:

• Agricultural residues
• Bagasse
• Wood waste
• Animal waste
• Municipal organic waste
• Industrial biological waste

Major Applications

• Biogas
• Electricity generation
• Cooking fuel
• Biofuels
• Industrial heat

Advantages

• Converts waste into useful energy
• Supports rural economies
• Can reduce dependence on traditional biomass
• Provides dispatchable renewable power in suitable applications

Challenges

• Feedstock availability
• Collection and transportation
• Competing uses of agricultural residues
• Air pollution from inefficient combustion

Nuclear Energy

Nuclear power is a non-fossil, low-carbon source of electricity, but it is not renewable.

India uses nuclear technology primarily based on uranium and is pursuing a long-term strategy involving thorium utilisation and fast-breeder technology.

Major Nuclear Power Locations

• Tarapur – Maharashtra
• Rawatbhata – Rajasthan
• Kalpakkam – Tamil Nadu
• Narora – Uttar Pradesh
• Kaiga – Karnataka
• Kakrapar – Gujarat
• Kudankulam – Tamil Nadu
• Gorakhpur – Haryana

Nuclear Capacity in 2026

India’s installed nuclear power capacity was 8,780 MW, with 24 reactors in commercial operation, excluding RAPS-1, according to government data.

Nuclear power contributed about 3.1% of India’s electricity generation in 2025–26.

Nuclear Energy Mission

In 2026, the Government announced a long-term objective of achieving 100 GW of nuclear power capacity by 2047.

The strategy includes:

• Expansion of indigenous PHWR technology
• Greater participation of public and private sectors
• Research and development in Small Modular Reactors (SMRs)
• Advanced nuclear technologies
• Expansion of fast-breeder technology

The government has also announced the SHANTI Act as part of the framework for wider participation in the nuclear sector.

Energy Storage: The Missing Link

The rapid growth of solar and wind has increased the importance of energy storage.

Renewable electricity generation can vary according to:

• Sunshine
• Wind speed
• Weather
• Seasonal conditions

Therefore, India’s energy transition increasingly requires:

Battery Energy Storage Systems (BESS)

Batteries store electricity when supply is high and release it when demand rises.

Pumped Storage Hydropower (PSP)

Water is pumped to an upper reservoir when electricity is available and released through turbines when electricity is required.

Why Storage Matters

Energy storage can help:

• Integrate renewable power
• Meet peak demand
• Improve grid stability
• Reduce renewable-energy curtailment
• Provide round-the-clock renewable electricity

The National Electricity Plan projects substantial growth in battery storage and pumped-storage requirements through 2031–32.

Green Hydrogen

Green hydrogen is hydrogen produced using renewable electricity, generally through electrolysis of water.

India’s National Green Hydrogen Mission, launched in 2023, aims to establish India as a global hub for production, utilisation and export of green hydrogen and its derivatives.

2030 Targets

• At least 5 million metric tonnes per annum of green hydrogen
• Around 125 GW of additional renewable-energy capacity
• Development of domestic electrolyser manufacturing
• Reduction in fossil-fuel dependence
• Decarbonisation of hard-to-abate sectors

Potential applications include:

• Fertiliser
• Refineries
• Steel
• Shipping
• Heavy transport
• Green ammonia
• Green methanol

Major Government Initiatives Related to Energy

1. PM Surya Ghar: Muft Bijli Yojana

Focuses on rooftop solar for households and aims to expand decentralised clean-energy generation.

2. PM-KUSUM

The scheme promotes solarisation of agriculture through:

• Decentralised renewable-energy plants
• Standalone solar agricultural pumps
• Solarisation of grid-connected agricultural pumps and feeders

The PM-KUSUM dashboard reported substantial implementation progress through July 2026.

3. National Green Hydrogen Mission

Focuses on developing India’s green-hydrogen production, manufacturing and export ecosystem.

4. National Solar Mission

Promotes large-scale solar-energy deployment.

5. International Solar Alliance

India and France launched the ISA to promote solar-energy deployment internationally, particularly in solar-rich developing countries.

6. Green Energy Corridors

Designed to strengthen transmission infrastructure required for integrating renewable-energy capacity into the national grid.

India’s Energy Transition

India’s energy transition involves moving towards a system based on:

Renewables + Nuclear + Storage + Grid Modernisation + Energy Efficiency + Green Fuels

However, the transition is not an immediate replacement of fossil fuels.

Coal and other fossil fuels continue to play an important role in meeting India’s electricity and industrial-energy requirements.

The challenge is therefore to achieve:

Energy Security + Economic Growth + Energy Access + Environmental Sustainability

Energy Conservation

Energy conservation means reducing unnecessary energy consumption and using energy more efficiently.

Major Measures

• Energy-efficient appliances
• LED lighting
• Public transport
• Electric mobility
• Energy-efficient buildings
• Industrial energy efficiency
• Smart grids
• Efficient irrigation
• Rooftop solar
• Recycling and circular-economy practices
• Reduced transmission and distribution losses

Why Energy Conservation Matters

Energy efficiency can:

• Reduce fuel consumption
• Lower electricity bills
• Reduce imports
• Improve energy security
• Reduce greenhouse-gas emissions
• Reduce pressure on natural resources

Major Challenges in India’s Energy Sector

1. Energy Security

India imports significant quantities of crude oil and other energy commodities.

2. Import Dependence

Dependence on imported fuels exposes India to:

• Geopolitical tensions
• Price volatility
• Supply disruptions
• Exchange-rate fluctuations

3. Renewable Intermittency

Solar and wind generation varies with weather conditions.

4. Storage

Large-scale deployment of batteries and pumped storage is essential for integrating variable renewable energy.

5. Transmission Infrastructure

Renewable resources are often located far from major consumption centres.

6. Critical Minerals

The clean-energy transition increases demand for minerals such as:

• Lithium
• Cobalt
• Nickel
• Graphite
• Rare earth elements

7. Land and Ecological Concerns

Large renewable-energy projects can create competing demands for land and affect local ecosystems.

Energy Resources: UPSC Prelims Facts

• Coal: Major fossil fuel and important thermal-power source.
• Petroleum: Hydrocarbon resource mainly found in sedimentary basins.
• Natural gas: Primarily methane.
• Solar: India’s largest renewable-energy source by installed capacity as of August 2026.
• Wind: Major potential along western and southern India.
• Hydropower: Renewable and useful for grid balancing.
• Nuclear: Non-fossil and low-carbon, but not renewable.
• Biomass: Converts biological material into useful energy.
• Green hydrogen: Produced using renewable electricity.
• BESS: Battery Energy Storage System.
• PSP: Pumped Storage Project.
• PM-KUSUM: Solarisation of agriculture.
• PM Surya Ghar: Rooftop solar for households.
• National Green Hydrogen Mission: India’s flagship green-hydrogen programme.

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