Climate doomsayers keep putting sell-by dates on their credibility

I was slightly surprised when Greta Thunberg announced at Davos that we had eight years left to save the planet. As long as that? Admittedly, that’s four years less than Alexandria Ocasio-Cortez, who put it at 12, although, come to think of it, that was last January, so presumably she now thinks we’ve got 11 years left. But some doomsayers have been much less optimistic. According to Peter Wadhams, a Cambridge professor interviewed in the Guardian in 2013, Arctic ice would disappear by 2015 if we didn’t mend our ways, while Gordon Brown announced in 2009 that we had just 50 days to save the Earth. Then again, playing the long game can also catch up with you. In 2004, Observer readers were told Britain would have a ‘Siberian’ climate in 16 years’ time. We’re supposed to be in the midst of that now.

On the face of it, we should be grateful that these gloomsters make such oddly precise predictions.