6.8. what is a Natural Energy Source?

Fossil fuel energy follows a very different pathway, even though fossil fuel is also being used to generate electricity. Fossil fuel is also the most abundant, only second to biomass (including wood).
There are three major forms of fossil fuels: coal, oil, and natural gas. All three were formed many hundreds of millions of years ago before the time of the dinosaurs—hence the name fossil fuels. The age they were formed is called the Carboniferous Period. It was part of the Paleozoic Era. “Carboniferous” gets its name from carbon, the basic element in coal and other fossil fuels. The Carboniferous Period occurred from about 360 to 286 million years ago. At the time, the land was covered with swamps filled with ...

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