Coal is a form of fossil fuel that is formed due to decay of old plants millions of years before. Coal is used extensively in thermal power plants for generation of electricity and production of steel. When coal is burnt, the chemical energy contained inside coal is converted to heat or thermal energy. The heat or thermal energy gets converted to kinetic energy when steam is created. The steam is then used to move the turbines of the plant. Here kinetic energy is converted to mechanical energy for the rotation of turbines. The turbines activate the generator and converts the mechanical energy to electrical energy. This energy is then used to power most of the homes and offices. Till today, Coal is used as a major source of fossil fuel to supply power to millions of homes across the world.