When humans, juxtaposed in the Biosphere and Technospere as we are, facilitate the handover of our food and the food of our livestock to power the Technosphere...through ethanol etc...I would say a threshold, in a set of potential thresholds, has been crossed in evolution on Earth.
Andrew Yost, PhD Forest Ecologist Oregon ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com
