Icy disagreement

The climate change debate is hedged by uncertainties, the novelist Ian McEwan wrote in Grist magazine last month (correction - I should have said that this piece originated on Open Democracy and also appeared in the Guardian newspaper).

Can we avoid what is coming at us, or is there nothing much coming at all? Are we at the beginning of an unprecedented era of international cooperation, or are we living in an Edwardian summer of reckless denial? Is this the beginning, or the end? We need to talk.
Any regular readers of George Monbiot's Guardian columns will probably be aware of his disagreements with his fellow environmentalist David Bellamy over climate change.