One of Australia's leading enviro-sceptics, the geologist and University of Adelaide professor Ian Plimer, 62, says he has noticed audiences becoming more receptive to his message that climate change has always occurred and there is nothing we can do to stop it.
In a speech at the American Club in Sydney on Monday night for Quadrant magazine, titled Human-Induced Climate Change - A Lot Of Hot Air, Plimer debunked climate-change myths.
"Climates always change," he said. Our climate has changed in cycles over millions of years, as the orbit of the planet wobbles and our distance from the sun changes, for instance, or as the sun itself produces variable amounts of radiation. "All of this affects climate. It is impossible to stop climate change. Climates have always changed and they always will."
His two-hour presentation included more than 50 charts and graphs, as well as almost 40 pages of references. It is the basis of his new book, Heaven And Earth: The Missing Science Of Global Warming, to be published early next year.
Plimer said one of the charts, which plots atmospheric carbon dioxide and temperature over 500 million years, with seemingly little correlation, demonstrates one of the "lessons from history" to which geologists are privy: "There is no relationship between CO2 and temperature."
Yep. That's right. Al Gore lied to us.
Who could believe a politician would do such a thing?