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Parting company with McKibben and, maybe, Hansen: The nation’s top climate scientist, NASA’s James Hansen, apparently now believes “the safe upper limit for atmospheric CO2 is no more than 350 ppm,” according to an op-ed by the the great environmental writer Bill McKibben. Yet while preindustrial levels were 280, we’re now already at more than 380 and . . . → Read More: More on the magic 350 Remember This: 350 Parts Per Million (emphasis added): This month may have been the most important yet in the two-decade history of the fight against global warming. Al Gore got his Nobel in Stockholm; international negotiators made real progress on a treaty in Bali; and in Washington, Congress actually worked up the nerve to raise gas mileage . . . → Read More: A new magic number: 350 |
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