This document defines and describes various renewable energy sources including wind, geothermal, hydropower, solar, and biomass energy. Wind energy harnesses the power of moving air to generate electricity. Geothermal energy uses heat from within the Earth captured as steam or hot water. Hydropower utilizes the energy from moving water to produce electricity. Solar energy converts the sun's rays into heat and electricity. Biomass energy comes from organic materials from plants and animals which store energy from the sun.

1. Renewable energies