Tomorrow, 350 Has a Whole New Meaning

350 isn’t just a number anymore -- it’s a movement. 

350 parts per million (ppm) is what scientists consider the safe upper limit for the concentration of carbon dioxide in our atmosphere. We're now at a flirting-with-disaster 387 ppm. To avoid the worst effects of climate change, we need get down to 350, and quick. The science is settled -- now we just need the political momentum to get it done.  

With that in mind, tomorrow, Sat., Oct. 24 has been dubbed the International Day of Climate Action. It's devoted to spreading the word about this magic number and grabbing the attention of media and world leaders as we count down to the December U.N. Climate Change Conference in Copenhagen. With just a few weeks left, now isour best opportunity to make a meaningful impression on the powers that be as they finalize their negotiating positions and before they pack their bags for Denmark. And on Tuesday, the Senate is set to hold hearings on the Clean Energy Jobs Bill.

Worldwide, people are planning more than 4,500 events, including rallies, parades, art exhibits, potlucks, races, film screenings, trash cleanups, and other creative actions for Saturday to show their support. Something's going on in every state; check out 350.org to search for events near you or publicize yours.

-- Année Tousseau / photo courtesy 350.org