A new U.N.-backed report by over 600 scientists from 40 countries says there now is at least 90% certainty that human activity is contributing to climate change.
In its Feb. 2 scientific assessment, its fourth, the Intergovernmental Panel on Climate Change forecasts continuing global warming, sea-level rises, erratic weather and widespread melting of ice and snow. IPCC was formed in 1989 by the World Meteorological Organization and the U.N. Development Programme. The panel has not previously asserted the human contribution to climate change with such a high degree of certainty.