A Greenpeace co-founder testified in Congress on Tuesday about global warming. What he said is hardly what anyone would expect.

Patrick Moore came off as a raving denier.

“There is no scientific proof that human emissions of carbon dioxide are the dominant cause of the minor warming of the Earth’s atmosphere over the past 100 years,” said Moore, who was testifying before the Senate Environment and Public Works Committee’s Subcommittee on Oversight.

“If there were such a proof, it would be written down for all to see. No actual proof, as it is understood in science, exists.”

Moore is somewhat famous for leaving Greenpeace, a large environmentalist organization that grew from a small activist group he belonged to in 1971 while earning his doctorate in ecology. He quit in 1986 because it had become too political and strayed away from the science he believed was its institutional strength.

Moore didn’t hold back in his Senate appearance. He quickly zeroed in on the United Nations Intergovernmental Panel on Climate Change and strongly scolded it for claiming there is a “95-100% probability” that man “has been the dominant cause of” global warming. Those numbers, he said, have been invented.

He also characterized the IPCC’s reliance on computer models as futile; told senators that history “fundamentally contradicts the certainty that human-caused CO2 emissions are the main cause of global warming”; and noted that “during the Greenhouse Ages,” a period that precedes our fossil-fuel burning civilization, “there was no ice on either pole and all the land was tropical and subtropical from pole to pole.”

Moore further crossed the line of accepted climate change discourse when he insisted “that a warmer temperature than today’s would be far better than a cooler one” and reminded lawmakers “that we are not capable, with our limited knowledge, of predicting which way” temperatures “will go next.”

Don’t look now, but maybe a scientific consensus exists concerning global warming after all. Only 36 percent of geoscientists and engineers believe that humans are creating a global warming crisis, according to a survey reported in the peer-reviewed Organization Studies. By contrast, a strong majority of the 1,077 respondents believe that nature is the primary cause of recent global warming and/or that future global warming will not be a very serious problem.

The survey results show geoscientists (also known as earth scientists) and engineers hold similar views as meteorologists. Two recent surveys of meteorologists (summarized here and here) revealed similar skepticism of alarmist global warming claims.

According to the newly published survey of geoscientists and engineers, merely 36 percent of respondents fit the “Comply with Kyoto” model. The scientists in this group “express the strong belief that climate change is happening, that it is not a normal cycle of nature, and humans are the main or central cause.”