NASA 'Greener' Climate Prediction model shows plants slow warming

CO2?s upward march continues unabated and for the first time in recorded history, the [url=http://www.esrl.noaa.gov/gmd/webdata/ccgg/trends/co2_trend_mlo.png]average mean CO2 concentration in the atmosphere as measured at Mauna Loa, Hawaii surpassed 290 ppm[/url]. A new NASA computer modeling effort has found that additional growth of plants and trees in a world with doubled atmospheric CO2 levels would create a new negative feedback ? a cooling effect ? in the Earth's climate system that could work to reduce future global warming.