Man changed climate for 8,000 years?

Posted by tourdemars to Terraforming at December 10, 2003 12:00 PM

Measurements of ancient air bubbles trapped in Antarctic ice offered evidence that humans have been changing the global climate since thousands of years before the industrial revolution. The combined increases of carbon dioxide and methane gases implicated in global warming were slow but steady and staved off what should have been a period of significant natural cooling, said Bill Ruddiman, emeritus professor at the University of Virginia.