From The Economist:
[It was] the hottest May ever, says the National Oceanic and Atmospheric Administration. The world’s average surface temperature was 0.74°C above its 20th-century average. Alaska was almost 2°C above its 1971-2000 level.
The heat has brought American business out in a rash. Two weeks after President Barack Obama proposed new rules ordering power stations to cut carbon emissions, the bosses of several big firms (including Coca-Cola and General Mills) demanded that other governments get on with it and negotiate a treaty on greenhouse gases. Now Michael Bloomberg, a former New York mayor, and several other gazillionaires—including three former Treasury secretaries—have come up with new forecasts of the economic damage that climate change might do. Their study is notable for its wealth of detail and for concentrating on things you can see.