By Paul Homewood
As you will recall, the Paris Agreement set a target of 2C warming from pre-industrial levels, but parties agreed to pursue efforts to limit the temperature increase to 1.5 °C. These of course were only “wishes”, and the Agreement had contained nothing of substance to meet either of these objectives.
Nevertheless, the upcoming COP26 is increasingly being presented as an opportunity to get global warming down from 2C to 1.5C. Even if you accept the basic premise of GHGs, this is a nonsense. As already pointed out, the national pledges made at Paris implied that emissions would carry on rising rapidly up to 2030, meaning that even 2C was not achievable. Now a new paper in Nature reveals just how far and how quickly emissions would have to be cut to meet the 1.5C target:
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