Blog

May 10, 2013

A major milestone.

Climate awareness image showing ocean sunset with text about CO2 levels exceeding 400 ppm for the first time. Promotes 350.org's mission to reduce carbon emissions to safe levels and build environmental movement.
Climate awareness image showing ocean sunset with text about CO2 levels exceeding 400 ppm for the first time. Promotes 350.org's mission to reduce carbon emissions to safe levels and build environmental movement.

For the first time, NOAA’s Mauna Loa observatory recorded an average daily CO2 concentration above 400 parts per million. Globally, we’re not yet at annual averages above 400, but this is indeed an important milestone. We’ve created 400.350.org to reflect on what this means, and talk about what we’re doing to cool the planet.

Please take a moment to read and share.