By Richard Black Environment Correspondent, BBC News website
Global temperatures will rise further in the future than previous studies have indicated, according to new research from two scientific teams.
They both used historical records to calculate the likely amplification of warming as higher temperatures induce release of CO2 from ecosystems.
They both conclude that current estimates of warming are too low, by anything up to 75%. It predicts that the global average temperature would rise by between 1.5C and 4.5C if human activities were to double the amount of carbon dioxide (CO2) in the atmosphere.
Click Here: http://news.bbc.co.uk/2/hi/science/nature/5006970.stm