Saturday, October 24, 2009, was the International Day of Climate Action put together by Bill McKibben and the folks at 350.org.
What's 350? It is the number that "leading scientists say is the safe upper limit for carbon dioxide—measured in "Parts Per Million" in our atmosphere. 350 PPM—it's the number humanity needs to get back to as soon as possible to avoid runaway climate change."
Check out 350.org, along with their beautiful photographs from around the world.
10 years ago
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