The Quiet Evolution of Trees

Long before trees appeared on Earth, animals and other land plants were scattered among the land masses. And before land plants came the land animals. How did it all happen, and where did they all come from?

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Fossil Fuels vs. Renewable Energy Resources

Alternative energy sources may be the underdogs today, but they'll be champions tomorrow.
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USGCRP Reports Global Warming Unequivocal and Primarily Human-Induced; Examines Impacts by Region 06/30/2009
That's Not Industrial Waste, It's "Fill Material" 06/29/2009
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