Answer :
wind energy - wind is source
coal - coal is source
petroleum - Crude oil is source
natural gas - fossil energy is source
solar - sun is source
What is Energy and Sources of Energy ?
The classical description of energy is the ability of a system to perform work, but because energy exists in so many forms, it is hard to find one comprehensive definition
- There are two sources of energy: renewable and nonrenewable energy.
- Primary energy sources take many forms, including nuclear energy, fossil energy -- like oil, coal and natural gas -- and renewable sources like wind, solar, geothermal and hydropower.
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