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Is This the Year CO2 hits 400 PPM?

Could be. Look at the trend, courtesy of the National Oceanic and Atmospheric Administration:

Atmospheric CO2 concentrations at Mauna Loa Observatory, courtesy of NOAA

Last month’s reading at the Mauna Loa Observatory in Hawaii reached 395.55 parts per million in January 2013, up more than 2 parts per million from just a year ago.

Hold your breath? Wait and see.

1 comment to Is This the Year CO2 hits 400 PPM?

  • Tom

    “Prolly” – what with all those Chinese (and many other countryies including our own) coal fired power plants, burned rainforest, factory smoke, auto and truck exhaust, incineration plants etc. going on and on (until they can’t) just adding to the naturally occuring forest fires should push us up some more.

    i don’t think Bill McKibbon is being realistic when he calls for 350 ppm as a goal since even that much is affecting the climate – plus we aren’t going to get there anyway until industrial civilization collapses world-wide.

    So buckle up folks, it’s gonna be a rough ride from here on out.

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