How Close to Catastrophe?

“On The Revenge of Gaia: Earth’s Climate in Crisis and the Fate of Humanity by James Lovelock and four other books on global warming.”

Bill McKibben in the New York Review of Books:

Lovelock_james20061116James Lovelock is among the planet’s most interesting and productive scientists. His invention of an electron capture device that was able to detect tiny amounts of chemicals enabled other scientists both to understand the dangers of DDT to the eggshells of birds and to figure out the ways in which chlorofluorocarbons (CFCs) were eroding the ozone layer. He’s best known, though, not for a gadget but for a metaphor: the idea that the earth might usefully be considered as a single organism (for which he used the name of the Greek earth goddess Gaia) struggling to keep itself stable.

In fact, his so-called Gaia hypothesis was at first less clear than that— “hardly anyone, and that included me for the first ten years after the concept was born, seems to know what Gaia is,” he has written. But the hypothesis has turned into a theory, still not fully accepted by other scientists but not scorned either. It holds that the earth is “a self-regulating system made up from the totality of organisms, the surface rocks, the ocean and the atmosphere tightly coupled as an evolving system” and striving to “regulate surface conditions so as always to be as favourable as possible for contemporary life.”

More here.