Two papers published in the last few weeks provide a sobering reality check after the rhetorical success of the Paris climate change conference in December. Getting any agreement was a diplomatic triumph but producing real change on the scale necessary will be much more difficult. The two documents are very different but both excellent pieces of work. Their calculations and assumptions are detailed, transparent and, most important of all, evidence based. Both, however, reflect a degree of unjustified optimism. Read more
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