350.org is named after what scientists say is the safe upper limit of carbon dioxide in the atmosphere, 350 parts per million. Right now, the atmosphere contains over 393 ppm of CO2 and going up about 2 ppm every year.

At 398 ppm of CO2 in our atmosphere, we’re already seeing massive climate disruption and devastating impacts, from the melting of the Arctic to the terrible floods and droughts of the last year. If we stay on our current pathway, CO2 levels could go up to as high as 700 ppm by the end of the century. That’s not a future we can leave for our children.

112 countries around the world have adopted the 350 ppm target as their official negotiating position at the UN Climate Talks, but the biggest emitters, including the US, still refuse to recognize the scientific imperative of meeting this crucial red line for the planet.

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