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The problem is we don’t know what the climate is doing. We thought we knew 20 years ago. That led to some alarmist books – mine included – because it looked clear-cut, but it hasn’t happened.

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— Scientist James Lovelock

James Lovelock, the maverick scientist who became a guru to the environmental movement with his “Gaia” theory of the Earth as a single organism, has admitted to being “alarmist” about climate change and says other environmental commentators, such as Al Gore, were too.

Lovelock, 92, is writing a new book in which he will say climate change is still happening, but not as quickly as he once feared. Read more.