Ian Rutherford Plimer (born February 12, 1946) is an Australian geologist, academic and businessman. He is a critic of creationism and of the scientific consensus that global warming is driven by anthropogenic CO2 . He has published approximately 60 academic papers and six books, including his book on the global warming debate,
Heaven and Eart  Global Warming: The Missing Science. He is a director of three mining companies.

What Heaven And Earth sets out to do is restore a sense of scientific perspective to a debate which has been hijacked by ‘politicians, environmental activists and opportunists’. It points out, for example, that polar ice has been present on earth for less than 20 per cent of geological time; that extinctions of life are normal; that climate changes are cyclical and random; that the CO2 in the atmosphere  to which human activity contributes the tiniest fraction  is only 0.001 per cent of the total CO2 held in the oceans, surface rocks, air, soils and life; that CO2 is not a pollutant but a plant food; that the earth’s warmer periods  such as when the Romans grew grapes and citrus trees as far north as Hadrian’s Wall were times of wealth and plenty.