A United Nations panel said it is more certain than ever humans are a dominant cause of global warming and predicted temperatures would continue to rise this century.
The Intergovernmental Panel on Climate Change said Friday it is "extremely likely", its strongest words yet, that humans are largely responsible for global warming.
In its last report in 2007, IPCC said it was "very likely" global warming was man-made.
The co-chair of the group that wrote the new report said it has found that the atmosphere and ocean have warmed, snow and ice have diminished, the global mean sea level has risen and the concentration of greenhouse gases has increased.
The U.N. panel predicted that global average temperatures would rise by 0.3 to 4.8 degrees Celsius by 2100 with sea levels rising by 26 to 82 centimeters.