INDIAN GEOGRAPHY

Detailed explanation-1: -Coal is primarily used as fuel to generate electric power in the United States. In coal-fired power plants, bituminous coal, subbituminous coal, or lignite is burned. The heat produced by the combustion of the coal is used to convert water into high-pressure steam, which drives a turbine, which produces electricity.

Detailed explanation-2: -Coal and petroleum are both composed of dead material that has been buried beneath the earth for a very long time. By decomposition, the dead matter turns into fossils at extremely high pressure and temperatures which are then used as fossil fuels. Thus, coal and petroleum are called fossil fuels.

Detailed explanation-3: -Gas is now the second largest source of electricity production globally. Its contribution is growing quickly in many countries as they substitute it for coal in the electricity mix.