Energy and Power Resources

• Four Varieties in Descending Order:
1. Anthracite: Over $90\%$ carbon content.
2. Bituminous: $70\% \text{ to } 80\%$ carbon content.
3. Lignite (Brown Coal): $40\% \text{ to } 55\%$ carbon content.
4. Peat: Below $40\%$ carbon content.
• Distinct Property of Anthracite: It is the highest-grade coal, extremely hard, jet-black with a metallic luster, burns with a smokeless blue flame, leaves almost zero ash, and has the highest calorific heat value of all coals.

• Definition: Mumbai High is a major offshore petroleum drilling oilfield situated in the Arabian Sea, approximately $160\text{ kilometers}$ west of Mumbai.
• Strategic Significance:
1. Petroleum is extracted from submarine sedimentary rock anticlines using a specialized offshore mobile drilling platform named "Sagar Samrat".
2. It is India's single most productive oilfield, contributing over $60\%$ of the nation's total domestic crude petroleum output, significantly reducing India's crude oil import dependency.

• Working Principle: A massive dam impounds river water in a high reservoir (storing potential energy). Water rushes down through massive steel pipes (penstocks), converting potential energy into high-velocity kinetic energy. The rushing water strikes the blades of hydraulic turbines, spinning them rapidly to drive electric generators that produce electricity.
• Two Advantages over Thermal Energy:
1. Clean & Renewable: Generates zero greenhouse gas emissions or toxic fly ash smoke, utilizing inexhaustible water.
2. Low Operating Costs: Once constructed, water is a free natural resource with no recurring fuel expenses, unlike coal.

• (a) Bhakra-Nangal Project: Built across the Sutlej River (in Himachal Pradesh and Punjab).
• (b) Hirakud Project: Built across the Mahanadi River (in Odisha; one of the longest earthen dams in the world).
• (c) Damodar Valley Project (DVC): Built across the Damodar River (in Jharkhand and West Bengal).

1. Tropical Geography: India is a tropical nation that enjoys over 300 clear, bright sunny days each year, receiving abundant solar radiation of $4\text{ to } 7\text{ kWh/m}^2$ daily.
   2. Decentralized Clean Power: Solar photovoltaic panels can be installed on rooftops, remote rural hamlets, and desert wastelands (e.g., Bhadla Solar Park in Rajasthan), bypassing expensive national grid transmission lines.
   3. Zero Emissions: Provides completely carbon-free green energy, combating climate change and air pollution.

• Definition: Biogas is a clean, combustible gaseous fuel (consisting of $60-70\%$ Methane, $CH_4$ and $CO_2$) produced by the anaerobic bacterial decomposition of animal dung (gobar), crop residues, and organic biomass in an airtight digester.
• Two Benefits:
1. Clean Cooking Fuel: Provides a clean, smokeless domestic cooking fuel, eliminating indoor smoke pollution from firewood that causes eye and respiratory diseases.
2. High-Grade Organic Manure: The residual digested slurry extracted from the plant serves as a sterile, nutrient-rich organic fertilizer rich in nitrogen and phosphorus.

• Two Radioactive Minerals: Uranium (e.g., $U-235$) and Thorium (richly found in the monazite sands of coastal Kerala).
• Two Atomic Power Stations:
1. Tarapur Atomic Power Station (in Maharashtra; India's first commercial nuclear plant, 1969).
2. Kudankulam Nuclear Power Plant (in Tamil Nadu) or Rawatbhata (in Rajasthan).

1. Use Energy-Efficient Appliances: Replace incandescent filament bulbs with LED lights and choose high star-rated energy-efficient refrigerators and air conditioners.
   2. Adopt Public Transport & Carpooling: Use metro rails, city buses, and bicycles instead of personal petrol cars for daily commuting.
   3. Avoid Phantom Power: Switch off lights, fans, and computer monitors when leaving a room; unplug electronics from wall sockets to prevent standby power draw.
   4. Harness Renewable Energy: Install rooftop solar water heaters and solar panels for domestic water heating and lighting.