From: Jeremy Hance, MONGABAY.COM, More from this Affiliate
Published December 6, 2011 07:56 AM

At least 74 percent of current warming caused by us

A new methodology to tease out how much current climate change is linked to human activities has added to the consensus that behind global warming is us. The study, published in Nature Geoscience found that humans have caused at least three-quarters (74 percent) of current warming, while also determining that warming has actually been slowed down by atmospheric aerosols, including some pollutants, which reflect sunlight back into space.

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Running thousands of models based on Earth's total energy budget, the study came up with findings incredibly similar to other methods. The study found that greenhouse gases have increased global temperatures by 0.85 degrees Celsius since the 1950s, however aerosols knocked that down by 0.45 degrees Celsius, leaving a total warming of 0.5 degrees Celsius. In fact, temperatures around the world have risen 0.55 degrees Celsius since the 1950s.

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