"That Iowa has some of the richest soil in the world is no secret, and a group of researchers at Iowa State University would like to ensure that IowaBuy Sneakers | Nike News
Soils offer new hope as carbon sink
NSW Department of Primary Industries: Science and Research, Australia, Wollongbar Agricultural Institute, 31 May 2007
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Positive Charcoal=Negative Carbon?
Why adding charcoal to the Earth's soils will also address climate change.
Ron Larson. Chair, American Solar Energy Society, Solar Today, November-December 2006