James Lovelock, founder of the global warming movement, is now supporting natural gas fracking and mocking the idea of wind power, according to The Toronto Sun.
The man, called "the godfather of global warming," called renewable energy "meaningless drivel."
Lovelock is a famous scientist who developed influential ideas about the environment and came up with several important inventions. But he now said he was too alarmist about climate change.
The Toronto Sun reports he still believes man-made global warming is happening, and that greenhouse gas emissions have to be cut back. But he admitted his doomsday predictions were clearly wrong.
Lovelock said the earth has not seen a rise in global temperatures this millenium in the way computer models predicted.
He also told The Guardian newspaper that climate change followers have turned their beliefs into a religion.
"It just so happens that the green religion is now taking over from the Christian religion," Lovelock said. "It's got all the sort of terms that religions use."
Lovelock said the science on global warming is not a settled fact.