Humanity has decided to yawn and let the real and present dangers of climate change mount. That was the argument I made in last week’s column. Nothing in the responses to it undermined that conclusion. If anything, they reinforced it. Judged by the world’s inaction, climate sceptics have won. That makes their sense of grievance more remarkable. For the rest of us, the question that remains is whether anything can still be done and, if so, what?

In considering this issue, a rational person should surely recognise the extent of the consensus of climate scientists on the hypothesis of man-made warming. An analysis of abstracts of 11,944 peer-reviewed scientific papers, published between 1991 and 2011 and written by 29,083 authors, concludes that 98.4 per cent of authors who took a position endorsed man-made (anthropogenic) global warming, 1.2 per cent rejected it and 0.4 per cent were uncertain. Similar ratios emerged from alternative analyses of the data.

By Martin Woolf

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