Conventional Energy Resources – Long Answer Questions
Medium Level (Application & Explanation)
Q1. Describe the distribution of coal in India and explain its main uses.
Answer:
Coal is mostly found in eastern and central India, in states like Jharkhand, West Bengal, Chhattisgarh, Odisha, Madhya Pradesh, Maharashtra, Telangana, Andhra Pradesh, and Tamil Nadu.
Important coalfields include: Jharia, Raniganj, Bardhaman, Dhanbad, Bokaro, Korba, Raigarh, Talcher, Singrauli, Hasdeo, and Neyveli (lignite coal in Tamil Nadu).
Major uses of coal are:
Thermal power plants generating over 70% of India’s electricity.
Steel industry, particularly coking coal used in blast furnaces at places such as Bokaro and Jamshedpur.
Fuel in cement, brick kilns, and industrial boilers.
Also for domestic heating in some areas.
Coal’s distribution affects industrial development since coal-rich states have many power plants and industries.
Q2. Explain the environmental and social problems caused by coal mining and use an example to illustrate.
Answer:
Burning coal releases CO₂, SO₂, NOₓ, and particulate matter, causing air pollution, acid rain and contributing to climate change.
Mine fires and subsidence create land collapse and health hazards. For example, Jharia coalfields suffer from fires burning underground for decades, displacing many people and releasing toxic gases.
Open-cast mining leads to deforestation, loss of biodiversity, and removal of topsoil.
Local populations face respiratory diseases due to dust and pollution.
Mining causes displacement of tribal and rural communities with often poor rehabilitation efforts.
Example: The area around Singrauli experiences heavy pollution from coal mining and power plants, severely affecting air quality.
Q3. Discuss the distribution of petroleum in India and its main economic uses.
Answer:
Petroleum is found both onshore and offshore in India.
Onshore oil fields are mainly in Assam (Digboi, Naharkatiya, Lakwa) and Gujarat (Ankleshwar, Mehsana, Gandhar).
Major offshore fields include Mumbai High, KG basin (Krishna-Godavari), and Cauvery basin.
Uses of petroleum include:
Fuels for transport like petrol, diesel, aviation turbine fuel.
Feedstock for petrochemical industries producing plastics, fertilizers, synthetic fibres, detergents, and lubricants.
Fuel for industries and domestic use such as LPG (cooking gas).
Petroleum is a backbone of the economy because much of daily transport and industry depend on it.
Q4. Identify major sources of natural gas in India and explain its advantages over other fossil fuels.
Answer:
Natural gas is produced in India mainly from western offshore fields such as Mumbai High, as well as onshore fields in Gujarat (Cambay basin), KG basin (offshore Andhra Pradesh), and some fields in Assam.
Advantages of natural gas:
Cleaner fuel compared to coal and petroleum as it produces less air pollution and greenhouse gases.
Used to generate electricity in gas-based power plants.
Essential feedstock for fertilizer (urea) production.
Used as domestic fuel in piped form and for transport in the form of Compressed Natural Gas (CNG), which reduces urban pollution (e.g., Delhi’s CNG buses).
Helps reduce dependence on more polluting fuels and supports cleaner energy policies.
Q5. What are the major challenges faced in electricity generation and supply in India?
Answer:
India depends heavily on coal-based thermal plants, which cause significant environmental pollution.
There are high transmission and distribution losses due to theft, old infrastructure, and technical inefficiencies.
Electricity supply is uneven; rural areas or some states face frequent power cuts and load shedding.
Large hydro projects cause displacement of local communities and ecological changes leading to protests.
Some states have high power tariffs, and industrial consumers subsidize agricultural and domestic electricity.
The electricity grid often suffers from aging infrastructure needing modernization and investment in smart grids and storage.
Nuclear energy though minor poses hazards related to accidents and radioactive waste disposal.
High Complexity (Analytical & Scenario-Based)
Q6. Analyze how the dependence on imported petroleum affects India’s economy and energy security.
Answer:
India imports a large share of its crude oil because domestic production meets only a part of demand.
This creates foreign exchange outflow, increasing the import bill and putting pressure on the economy.
Global oil price volatility exposes India to sudden fuel price hikes, affecting inflation and transport costs.
Geopolitical tensions in oil-producing regions can disrupt supplies, posing a risk to energy security.
Import dependence makes India vulnerable to price shocks and trade imbalances.
To secure supply, India has developed Strategic Petroleum Reserves at places like Visakhapatnam.
The government promotes diversification into renewables and natural gas to reduce this risk but petroleum imports remain critical.
Q7. Evaluate the environmental impact of coal mining and thermal power generation on local communities, providing examples from India.
Answer:
Coal mining causes deforestation, soil erosion, and biodiversity loss, affecting local ecosystems.
Open-cast mining destroys farmland and forests, while underground mining risks land subsidence.
Thermal power plants emit CO₂, SO₂, NOₓ, causing air pollution and acid rain damaging crops/forests.
Local communities near power plants, like Singrauli, experience serious health issues, especially respiratory diseases.
Displacement of tribal and farming communities occurs without adequate compensation or rehabilitation.
Toxic waste and fly ash disposal pollute water and land, harming agriculture and livelihoods.
Overall, environmental degradation leads to long-term social and economic hardships for local people.
Q8. Given the limited natural gas reserves and the high cost of pipeline infrastructure, suggest strategies India can adopt to maximize the use of natural gas.
Answer:
Increase imports of LNG (liquefied natural gas) to supplement domestic production and meet demand.
Expand city gas distribution networks in metro and tier-2 cities to replace more polluting fuels.
Promote use of CNG in public transport and private vehicles to improve urban air quality (like Delhi's model).
Encourage industries to switch from coal/petroleum to cleaner natural gas-based processes.
Invest in regional pipeline corridors with public-private partnerships to reduce infrastructure costs.
Explore new offshore and onshore gas fields with advanced technology to increase domestic supplies.
Develop compressed natural gas terminals and LNG re-gasification plants closer to consumption hubs to reduce transport costs.
Incentivize research on alternative gas storage and transportation methods like compressed biogas and pipelines in difficult terrain.
Q9. Discuss the pros and cons of hydroelectric power projects in India, highlighting the social and environmental concerns involved.
Answer:
Pros:
Hydroelectric power is a renewable and clean source of energy with no direct emissions.
Large projects like Bhakra Nangal, Tehri and Sardar Sarovar provide electricity, irrigation water, and flood control.
Large storage reservoirs help regulate river flow and support agriculture.
Cons:
Large dams submerge vast areas leading to displacement of people, often tribals, with inadequate rehabilitation.
Ecosystem disruption affects local wildlife, fish migration, and forest cover.
Altering natural river flow impacts downstream agriculture and fisheries.
Social unrest and protests have stalled some projects due to these concerns.
Construction costs and long gestation periods make some projects economically challenging.
Balancing energy needs and social justice remains a key challenge.
Q10. Imagine you are appointed as an energy advisor for a state lacking coal reserves but with growing industrial demand. Suggest an energy strategy balancing economic growth and environmental sustainability.
Answer:
Since coal is unavailable, prioritize natural gas-based power plants due to cleaner emissions and high efficiency.
Develop city gas distribution for domestic and industrial consumption in urban centers.
Promote renewable energy sources like solar and wind, especially if the state has favorable climate conditions (e.g., Gujarat-style solar parks).
Invest in energy efficiency measures in industries to reduce power wastage.
Create incentives for industries to install cogeneration plants or captive power from waste or biomass.
Coordinate with the national grid to import electricity from coal-based plants elsewhere but push for gradual transition.
Implement strict pollution control standards and monitor industrial emissions carefully.
Encourage public transport using CNG or electric vehicles to reduce dependence on petroleum fuels.
This balanced approach would support industrial growth while minimizing environmental damage.
