Conventional Energy Resources – Long Answer Questions

Medium Level (Application & Explanation)

Q1. Describe the distribution of coal in India and explain its major uses.

Answer:

Coal is mainly found in eastern and central India, especially in the Damodar Valley (Jharkhand and West Bengal) with important coalfields such as Jharia, Raniganj, Bardhaman, Dhanbad, and Bokaro.
Other major coalfields include Korba and Raigarh in Chhattisgarh, Talcher and other fields in Odisha, Singrauli near the MP-UP border, Wardha valley in Maharashtra, Godavari valley in Telangana and Andhra Pradesh, and Neyveli in Tamil Nadu (lignite coal).
Uses: Coal is the major fuel for thermal power plants, producing over 70% of India’s electricity. It is also vital in the steel industry, especially coking coal used in blast furnaces in places like Bokaro and Jamshedpur. Coal fuels cement kilns, industrial boilers, and provides domestic heating in some regions.
This distribution is uneven, leading to transport costs for coal-poor states.

Q2. Explain the environmental and social problems caused by coal mining in India.

Answer:

Mining causes air pollution due to emissions of CO₂, SO₂, NOx and particulate matter, contributing to acid rain and climate change. For example, Singrauli region suffers heavy air pollution.
Jharia coalfields have had underground fires causing toxic gas release, displacement, and land subsidence.
Open-cast mining causes deforestation, loss of biodiversity, and topsoil erosion.
Local communities often suffer from respiratory diseases due to polluted air.
Mining displaces many tribal and rural populations, who face inadequate rehabilitation and loss of livelihoods.
Illegal mining adds to loss of revenue and safety hazards.

Q3. Discuss the distribution and key uses of petroleum in India.

Answer:

Petroleum was first discovered in Digboi, Assam. Important oilfields are located in Assam (Digboi, Naharkatiya, Lakwa), Gujarat (Ankleshwar, Mehsana, Gandhar), and offshore fields like Mumbai High, Krishna-Godavari (KG) basin, and Cauvery basin.
Uses of petroleum include transport fuels such as petrol, diesel, and aviation fuel (ATF). Petroleum is the base for many petrochemicals like plastics, fertilizers, synthetic fibers, and detergents.
It is also used in industrial fuel and households use LPG (liquefied petroleum gas) for cooking, which is refined from crude oil and natural gas.

Q4. What are the problems related to petroleum extraction and use in India? Support with examples.

Answer:

India is heavily dependent on imports for its crude oil, leading to vulnerability in foreign exchange and energy security.
Offshore drilling and transport result in risks of oil spills causing marine pollution and damage to coastal ecosystems and fisheries.
Burning petroleum products causes greenhouse gas emissions and local air pollution.
Oil field development can cause land-use changes and displacement of communities, such as around Assam’s oilfields.
Price volatility in the international oil market affects India’s fuel prices and inflation.
Risks of fires and blowouts on rigs pose safety hazards.
Easy-to-extract fields are depleting, making exploration deeper and costlier.

Q5. Describe natural gas distribution, its uses, and challenges faced in India.

Answer:

Natural gas occurs associated with oil and in independent gas fields. Major fields are in western offshore (Mumbai High complex), Gujarat’s Cambay basin, KG basin (offshore Andhra Pradesh), and Assam.
Uses: Natural gas generates electricity in gas-based power plants, is a feedstock in urea fertilizer production, supplied for domestic use as piped natural gas, and used as CNG in vehicles (e.g., Delhi's buses).
Challenges include limited proven reserves, high infrastructure costs for pipelines, risk of leaks and explosions, costly imports of LNG, and declining production in aging onshore fields.

Q6. Explain the role of electricity in India’s economy and the key sources of electricity generation.

Answer:

Electricity powers industries, agriculture, domestic households, services, and transport; it is essential for economic growth.
The largest share is produced by coal-based thermal power plants (like Vindhyachal, Korba, Singrauli), followed by hydroelectric plants (Bhakra Nangal, Tehri, Sardar Sarovar, Hirakud), and nuclear plants (Tarapur, Rawatbhata, Kudankulam).
Renewable energy is growing but less than conventional sources.
Distribution involves a national grid with regional grids to balance supply and demand. Rural electrification programs have increased access, but quality and 24x7 supply still vary.

High Complexity (Analytical & Scenario-Based)

Q7. Analyze the environmental and social consequences of coal mining in Jharia, and suggest measures to mitigate them.

Answer:

In Jharia coalfields, underground fires have been burning for decades, causing release of toxic gases harmful to local health.
The fires lead to subsidence, causing houses and land to collapse, leading to displacement of communities and loss of livelihoods.
Air pollution worsens respiratory diseases in residents.
Social problems include insufficient rehabilitation and economic hardship for displaced families.
To mitigate these issues:
- Relocate affected families with proper rehabilitation and compensation.
- Implement fire control and mine management technologies to extinguish fires.
- Increase afforestation efforts to restore environment.
- Enforce stricter regulations and monitoring of mining activities.
- Promote use of alternative, cleaner energy sources to reduce coal demand.

Q8. Evaluate the importance of Maharashtra and Gujarat in India’s petroleum and natural gas sectors.

Answer:

Maharashtra has the prestigious Mumbai High offshore oil and gas fields, one of India’s largest production centers, critical to domestic supply.
The state also hosts several refineries and petrochemical industries, contributing significantly to industry and employment.
Gujarat has important onshore oilfields (Ankleshwar, Mehsana, Gandhar) and gas fields (Cambay basin).
Gujarat is a major hub for petrochemical plants, cementing its importance as India’s chemical and energy corridor.
Both states are well connected with pipeline infrastructure for transporting oil and gas across India.
Their ports enable export-import of petroleum products and LNG, linking India to international energy markets.
The strategic location and resource availability make them indispensable in India’s energy security and industrial development.

Q9. Discuss how electricity distribution and access challenges affect rural households in India.

Answer:

Despite significant progress under schemes like Saubhagya, rural households face issues such as intermittent supply and voltage fluctuations which affect daily life and appliances.
Some areas still lack 24x7 availability, limiting use of electric pumps for irrigation and small enterprises.
Transmission and distribution losses, and theft increase costs and reduce supply efficiency.
Poor infrastructure and lack of modernization cause frequent power cuts, leading to reliance on less sustainable fuels.
Limited access restricts rural education, healthcare, and communication improvements.
To improve this situation:
- Investments are needed in rural grid infrastructure and smart meters.
- Promote decentralized renewable energy systems like solar microgrids.
- Strengthen management and reduce losses for uninterrupted power supply.

Q10. Imagine a coastal fishing community near Mumbai facing challenges due to offshore oil drilling. How can their problems be addressed by balancing developmental and environmental concerns?

Answer:

Offshore oil drilling near Mumbai provides economic benefits but threatens marine ecology and fishing livelihoods by risking oil spills and habitat destruction.
Environmental pollution affects fish population and coastal water quality, impacting the community’s traditional occupation and income.
To address these challenges:
- Strict environmental regulations and constant monitoring should be enforced to prevent spills.
- Oil companies need to invest in clean, safe technology and emergency response plans to protect ecosystems.
- Government should provide alternate livelihood or compensation to impacted fishers.
- Encourage community participation in decision-making for offshore projects.
- Promote sustainable fishing practices and support skill development in alternate sectors.
This integrated approach ensures development while preserving coastal life and environment.