“The IPCC was set up in 1988 to assess global warming and its impacts. The report released Sunday caps its latest assessment, a mega-review of 30,000 climate change studies that establishes with 95-percent certainty that most of the warming seen since the 1950s is man-made. The IPCC’s best estimate is that just about all of it is man-made, but it can’t say that with the same degree of certainty.
 
Today only a small minority of scientists challenge the mainstream conclusion that climate change is linked to human activity.
 
Global Climate Change, a NASA website, says 97 percent of climate scientists agree that warming trends over the past century are very likely due to human activities.”