It seems like the efforts to find the best alternative energy sources are seriously being looked into by lots of countries including most US cities. One proof is the signing of the Kyoto Treaty. The main aim of the concerned group and individuals is to lessen the greenhouse gases and pollutants. The renewable energy sources have proven to be of great help in reducing the quantity of toxins, which are by-products of the use of energy. These sources also preserve most of the natural resources that people use as resources of energy. What are the most popular sources of renewable energy? Here's a list to give you some basic understanding about the matter.

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