In actual fact thanks to the ice-core samples taken in Greenland, we know that man has little to do with global warming - and the future is very uncertain, whatever man gets up to.
The ice-core samples showed that in the last 100,000 years, the earth climate has been nothing like as stable and tranquil as we have experienced during the last 10,000 years of man’s civilisation.
Even as recent as some 12,000 years ago, the earth began to warm, from yet another cold period - and quite rapidly as well.
But then, abruptly, plunged back into bitter cold for a thousand years or so, know as the Younger Dryas.
At the end of this thousand year onslaught, average temperatures leaped again, by as much as 4 degrees Celsius in twenty years!
The equivalent of exchanging the climate of the Scandinavia to that of the Mediterranean in just two decades.
And some local changes were even more dramatic, changing by as much as 8 degrees in 10 years.
With a global population of 7 billion - we simply couldn’t handle those sorts of temperature variations now.
And the alarming thing is - we have no idea what caused these wild variations and there is no reason why the earth shouldn’t simply revert back to another ice-age at any given time.