Tuesday
September 16, 2014

Homework Help: Geography

Posted by mysterychicken on Sunday, October 25, 2009 at 5:17pm.

Compare and contrast the various sources of energy.

---my teacher told me to do renewable and non-renewable.

this is what i got:

Energy sources are of two types: nonrenewable and renewable. Energy sources are considered nonrenewable if they cannot be replenished in a short period of time. On the other hand, renewable energy sources such as solar and wind can be replenished naturally in a short period of time.
One non-renewable source found in the world today is coal. Coal is a combustible black or brownish-black sedimentary rock composed mostly of carbon and hydrocarbons. It is the most abundant fossil fuel produced in the United States.
Coal is a nonrenewable energy source because it takes millions of years to create. The energy in coal comes from the energy stored by plants that lived hundreds of millions of years ago, when the Earth was partly covered with swampy forests.
Almost 93% of the coal used in the United States is used for generating electricity. Except for a small amount of exports, the rest of the coal is used as a basic energy source in many industries including steel, cement, and paper. The major uses of coal are for electric power and for industry.

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