Solar Energy: I Need As Much Information About Solar Energy Possible. Can You Give Me Some Information And Some Source Links (5/16/2011)

I need to know:
What solar energy is, how it gets the copper wire/magnet to spin to produce electricity, where in the world is it used, how expensive or cheap it is to harness, what companies and/or governments are researching this type of energy, and the problems with this energy harnessed from fossil fuels. I hope I can choose a great Best Answer!!

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