Towards Green Energy — Maharashtra (SSC) Class 10 Science Solutions (Free)

Renewable energy sources are natural resources that can be replenished continuously without depletion. Examples: Solar energy from the sun, wind energy from wind turbines, hydroelectric energy from flowing water, geothermal energy from Earth's heat, biomass energy from organic matter.

Solar energy is preferred because: (1) It is renewable and inexhaustible. (2) It does not produce harmful greenhouse gases or pollution. (3) It reduces carbon footprint and helps combat climate change. (4) Maintenance costs are low after installation. (5) It is sustainable for long-term use.

Wind turbines convert wind energy to electrical energy through: (1) Wind blades rotate when wind flows over them. (2) The rotating shaft drives a generator. (3) The generator converts mechanical energy into electrical energy. (4) Power is transmitted through cables to a grid or battery system. Large wind farms harness consistent wind patterns for efficient generation.

Sustainability ensures: (1) Present energy needs are met without compromising future generations' resources. (2) Environmental damage is minimized through clean energy sources. (3) Renewable resources are managed responsibly. (4) Economic growth continues without depleting natural capital. (5) Climate goals are achieved while maintaining social and ecological balance.

Three environmental advantages: (1) Reduction in greenhouse gas emissions, which slows global warming and climate change. (2) Elimination of air and water pollution caused by fossil fuel combustion. (3) Conservation of non-renewable resources like coal, oil, and natural gas for future generations. (4) Protection of ecosystems and biodiversity from mining and drilling activities.

Hydroelectric power works by: (1) Water is dammed to create a reservoir with potential energy. (2) Water flows downward through tunnels with high velocity. (3) The flowing water drives turbines connected to generators. (4) Generators convert mechanical energy into electricity. (5) The electricity is transmitted to homes and industries. Efficiency is high and no emissions are produced.

Individual measures: (1) Install solar panels on homes or use solar water heaters. (2) Support renewable energy policies and vote for environment-friendly candidates. (3) Reduce electricity consumption through energy-efficient appliances. (4) Use public transport, cycle, or walk instead of personal vehicles. (5) Promote awareness about climate change and green energy benefits in communities.