You may not have noticed, but 2016 was the hottest year for over 100,000 years. At least this was the claim reported last week by The Guardian, under the headline “Planet at its hottest for 115,000 years thanks fo climate change, experts say”.

The “experts” in question are a bunch of US scientists led by James Hansen, the former Nasa employee who did so much to set the great global warming scare on its way in 1988. And of course such a claim could only be made by ignoring all the evidence that the earth was actually hotter than today during the Mediaeval Warm Period, less than 1,000 years ago, and even more so during the thousands of years of the Holocene Optimum, following its emergence from the last ice age 10,000 years ago.

But Hansen and his gang do not stop there. They argue that we can only hope to save the planet by finding ways to suck vast quantities of CO2 out of the atmosphere, at a cost, they estimate, of up to $570 trillion. That figure which may trip off the tongue, but it equates to seven times the world’s entire current annual GDP, or $77,000 for every human being now alive.