Evaluation of DTI
This site does not really seem to have much of a bias. It does advocate the use of renewable energy sources, but I don't see any real political motivation behind this. As far as I know, the site's information seems credible and accurate and it probably is because it is made by the Department of Trade and Industry in the UK. It gives a good overview of the different types of energy in an easy to use and navigate format.
ShinyKobold
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