sábado, 16 de octubre de 2010

Summary #1 Energy Resources

Energy resources is about ways of getting energy so we can generate electrical power.
Solar power. that's obvious, but the energy in coal originally came from the sun too.Prehistoric plants stored the sun's energy in their leaves, and when they died they eventually formed coals seams, the energy was still there.So when we burn coal (or any fossil fuel), we're releasing chemical energy that was stored  in plants millions of years ago.
The same goes for wind and wave power.Waves occur because of winds, and winds blow because the sun warms our atmosphere.Warm airs tends to rise, and winds are due to other air moving in to replace it.
Most power stations burn coal, oil or natural gas to run the generators.Others use uranium, or the flow of water. Electricity is sent around the country using high-voltage power lines. Nearly all of the power we use comes from large power sations, altough some places such as isolated farms, or hospitals, have their own diesel generators.

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