fossils fuels, geothermal, nuclear energy, hydro energy, solar energy, biomass energy
1. It is the energy that comes from the sun.
2. It is the energy that involves water.
3. It is the energy that comes from the inner core of the earth.
4. It is the result from the splitting or fission of atomic nuclei.
5. It is the energy formed from the remains of plant and animals which lived thousands of years ago.​