Climate research nearly unanimous on human causes, survey finds. The Guardian 20130516

http://www.guardian.co.uk/environment/2013/may/16/climate-research-nearly-unanimous-humans-causes
Of more than 4,000 academic papers published over 20 years, 97.1% agreed that climate change is anthropogenic.

A survey of thousands of peer-reviewed papers in scientific journals has found 97.1% agreed that climate change is caused by human activity.

Authors of the survey, published on Thursday in the journal Environmental Research Letters, said the finding of near unanimity provided a powerful rebuttal to climate contrarians who insist the science of climate change remains unsettled.