In 1965 executives at Shell wanted to know what the world would look like in the year 2000. They consulted a range of experts, who speculated about fusion-powered hovercrafts and "all sorts of fanciful technological stuff". When the oil company asked the scientist James Lovelock, he predicted that the main problem in 2000 would be the environment. "It will be worsening then to such an extent that it will seriously affect their business," he said.
"And of course," Lovelock says, with a smile 43 years later, "that's almost exactly what's happened."
Lovelock has been dispensing predictions from his one-man laboratory in an old mill in Cornwall since the mid-1960s, the consistent accuracy of which have earned him a reputation as one of Britain's most respected - if maverick - independent scientists. Working alone since the age of 40, he invented a device that detected CFCs, which helped detect the growing hole in the ozone layer, and introduced the Gaia hypothesis, a revolutionary theory that the Earth is a self-regulating super-organism. Initially ridiculed by many scientists as new age nonsense, today that theory forms the basis of almost all climate science.