ABSTRACT
Renewable energy is energy from renewable resources. From the perspective of the human time scale, these renewable resources can be naturally supplemented without human intervention and are inexhaustible. Such power is contrary to non-renewable energy, and it encompasses solar energy, hydro energy, wind energy, biomass energy, wave energy, tidal energy, ocean temperature difference energy, geothermal energy and the like. The renewable energy is usually applied in four major areas: power generation, heating and cooling of air and water, transportation and energy services in villages, or areas away from the power grid.
