This document discusses various renewable energy sources including wind, solar, biomass, geothermal, hydro, and ocean energy. Wind energy is captured by turbines that convert the kinetic energy of wind into electrical energy. Solar energy is obtained from the sun and used to heat homes and water as well as generate electricity through solar panels. Biomass energy comes from plants such as corn that are turned into fuels like ethanol and biodiesel. Geothermal energy harnesses the natural heat inside the Earth for energy purposes.