Measurements show that about 40% of the carbon dioxide emitted through fossil fuels and deforestation remains in the atmosphere , while an estimated 30% is absorbed by trees and other plants and another 30% by the oceans <a href="http://www.ucar.edu/news/releases/2007/carbonsink.shtml">http://www.ucar.edu/news/releases/2007/carbonsink.shtml</a> Jun 2007 National Center for Atmospheric Research (NCAR) 127.