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350 ppm: “the most important number in the world” - Bill McKibben

Last December, while industrial nations dithered and ducked the issue at Bali, chief NASA scientist James Hansen declared that the planet’s air already contained 385 ppm of CO2, increasing by 2 ppm yearly, and that anything above a 350 ppm “tipping point” invites catastrophe.(1)

Tufts University researchers have just put a price tag on delay; by 2100 global warming will cost the US economy $3.8 trillion a year! This bombshell news is the equivalent of the Stern Report in the UK.(2)

http://mecteam.blogspot.com/2008/06/350-ppm-most-important-number-in-world.html