Popular Mechanics September Techwatch has two excellent brief articles on new renewable energy technology in the works:
A weed that's seeds are 60% veggie oil & grows in harsh nutient-poor conditions - Jatropha CurcasA brief on it in Techwatch in September's issue of Popular Mechanics. Interesting for the biodiesel / veggie oil fuel movement. Currently being experinmented with on two plantations in India. Page 18, but not much more info than I just gave.
Also in the same issue Techwatch page 17, using miles long tubes to exploit barometric pressure differential to drive electricity producing turbines on a large scale.
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