By Doyle RiceUSA Today

Forget the four out of five dentists who recommend Trident — try the 97 out of 100 scientists who believe in man-made climate change.

This data comes from a new survey out this week in the Proceedings of the National Academy of Sciences.

The study found that 97 percent of scientific experts agree that climate change is “very likely” caused mainly by human activity.

The report is based on questions posed to 1,372 scientists. Nearly all the experts agreed that it is “very likely that anthropogenic greenhouse gases have been responsible for most of the unequivocal warming of the Earth’s average global temperature in the second half of the 20th century.”

Click here for an interactive graphic that shows how global warming occurs.

As for the 3 percent of scientists who remain unconvinced, the study found their average expertise is far below that of their colleagues, as measured by publication and citation rates.

In the study, the authors wrote: “This extensive analysis of the mainstream versus skeptical/contrarian researchers suggests a strong role for considering expert credibility in the relative weight of and attention to these groups of researchers in future discussions in media, policy, and public forums regarding anthropogenic climate change.”

The study authors were William R.L. Anderegg, James W. Prall, Jacob Harold, and Stephen H. Schneider.

This article was written by Doyle Rice and published in USA Today on June 22, 2010. Photo by Ryan Carter/Flickr.

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