Types of renewable energy resources include:
Renewable energy resources may be used directly as energy sources, or used to create other forms of energy for use. Examples of direct use are windmills, solar ovens, and geothermal heat pumps. Examples of indirect use in creating other energy sources are electricity generation through wind generators or solar cells, or production of fuels such as ethanol from biomass.
Compare with nonrenewable energy.
Related categories• ECOLOGY AND THE ENVIRONMENT
• SUSTAINABILITY AND GREEN LIVING
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