Which of the following is a nonrenewable energy resource?

Environmental Science

A. Solar
B. Methane
C. Hydroelectric
D. Coal

Most non-renewable energy sources are fossil fuels: coal, petroleum, and natural gas. Carbon is the main element in fossil fuels. For this reason, the time period that fossil fuels formed (about 360-300 million years ago) is called the Carboniferous Period.

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