This graph should change the debate over global warming forever.

Pay close attention to what happens to the black line before and after the vertical white line. Everything to the left of that line was pieced together by global warming advocates after the fact. Their predictions going forward — to the right of the white line — have been proven wrong. If they were right, the black line would track with the pink and red areas. It doesn’t.

The source of this graph is the United Nations’ Intergovernmental Panel on Climate Change.

The effect of publishing this graph has been swift. Global warming advocates are backtracking.

Academics are revising their views after acknowledging the miscalculation. Last night Myles Allen, Oxford University’s Professor of Geosystem Science, said that until recently he believed the world might be on course for a catastrophic temperature rise of more than five degrees this century.

But he now says: ‘The odds have come down,’ – adding that warming is likely to be significantly lower.
Prof Allen says higher estimates are now ‘looking iffy’.

Yesterday Piers Forster, Climate Change Professor at Leeds University, said: ‘The fact that global surface temperatures haven’t risen in the last 15 years, combined with good knowledge of the terms changing climate, make the high estimates unlikely.’

And Professor Judith Curry, head of climate science at the prestigious Georgia Institute of Technology, said: ‘The models are running too hot. The flat trend in global surface temperatures may continue for another decade or two.’

James Annan, of Frontier Research For Global Change, a prominent ‘warmist’, recently said high estimates for climate sensitivity now look ‘increasingly untenable’, with the true figure likely to be about half of the IPCC prediction in its last report in 2007.

Global warming as it has been sold politically by alarmists like Al Gore is science fiction. He got rich, the rest of us have gotten stuck with the tax and energy bills. Governments including our own have invested vast sums of money imposing a “greener” economy, based on previous predictions that have now turned out flat wrong.

President Obama intends to double down on his bad green investments while he kills off the US coal industry and imposes a regime that, in his own words, will cause energy prices to “skyrocket.” He and his EPA chiefs should be hauled to Congress for hearings, using the graph above as Exhibit A against them.