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 Renewable energy

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Posts : 35
Join date : 2013-07-26

PostSubject: Renewable energy   Fri Jul 26, 2013 12:40 pm

Are you interested in renewable energy? So far the mainly discussed renewable energy sources include solar, hydro, nuclear, bio (wood, peat, and some specific plant oil), etc. Wood is not so much renewable like solar or hydro energy, it takes about 20-30 years to get a tree grown up, and generally its recycle duration is about 100 years, but comparing with petro oil, it's still considered as renewable energy source.
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