Co-editor of Mother Jones Clara Jeffery on Mauna Loa CO2 readings hitting 400 ppm: "This will prove to be the biggest news of the decade/century"

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This will prove to be the biggest news of the decade/century: http://www.nytimes.com/2013/05/11/science/earth/carbon-dioxide-level-passes-long-feared-milestone.html?hp&_r=0 …