Electricity can be generated in a number of ways. It can come from renewable resources such as biomass and waste, geothermal heat or steam, solar energy, rivers or small hydroelectric reservoirs, and wind energy; or, it can be produced from resources such as coal, large hydroelectric reservoirs, natural gas, or nuclear fuels.
Energy conservation refers to reducing energy consumption through using less of an energy service. Energy conservation differs from efficient energy use, which refers to using less energy for a constant service.
Government of India has undertaken a two pronged approach to cater to the energy demand of its citizens while ensuring minimum growth in CO2 emissions, so that the global emissions do not lead to an irreversible damage to the earth system.