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Climate Scientists: Global Warming "Extremely Likely" Caused by Humans

An international team of climate scientists reports with near certainty that most of the global temperature rise over recent decades is due to human activity. In addition, they warn that sea levels could rise by more than a meter by the year 2100 if fossils fuel emissions are not curtailed.

The findings are reported in the latest summary from the U.N. International Panel on Climate Change, which was leaked after it was sent to a large group of people who had signed up to review it.

In the strongest language the panel has used so far, the draft report says "it is extremely likely that human influence on climate caused more than half of the observed increase in global average surface temperature from 1951 to 2010."

The report's findings will be discussed and edited by governments and scientists in Stockholm before its official release at the end of September, and the text could change, according to the panel spokesman.

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