Examples of perpetual resources include wind energy, solar energy and tidal energy. Perpetual resources are those resources that have rate of use, but they cannot be depleted.
Wind, water, biomass and sunlight are used in many different ways, but they are never depleted. Water has hydraulic energy, which is harnessed through hydroelectric plants and dams, and transformed into electric power. Solar energy can be converted into heat or electric power for use. With the use of turbines, wind is used in making electric energy. Biomass contains energy that can be turned into electric energy, caloric energy or used to create bio-fuel.