Alternative Green Energy - Is it Pie in the Sky Or Reality?

Due to growing concerns about the green house effect governments are looking towards alternative green energy sources as a potential solution. Energy sources such as solar and wind are considered "green" due to them being environmentally friendly and the fact they create less pollution than other energy sources. In fact if you asked most people to name a green energy source they would probably answer solar or wind but there are also geothermal, hydroelectric and biomass.
No matter where you

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