The certainty of climate change

Scientists say it’s “extremely likely” that human activity is boosting the planet’s temperature

By Stephen Ornes, 12:13 PM October 16, 2013

Earth has a fever. Scientists are more certain now than ever before that people are largely to blame.

It is “extremely likely” that human activities have contributed greatly to Earth’s increasing temperature, reports an international group of climate change researchers. How likely is that? Scientists say they are now 95 to 100 percent certain that people have had a big role in warming. A summary of the latest report, released September 27, was based on information published through 2012.


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