Renewable energy is the energy produced from fully natural resources. They are replenished naturally so we don’t have to worry about them running out. They are an ideal solution to our current energy crisis. Biomass: Biomass is made of fully organic material like plant and animal matter. Wood, garbage and manure are all examples of this type of energy. It is considered renewable because trees and plants can always be regrown. When you burn wood it releases heat; this is considered biomass ener