400 ppm
Goodbye World: We’ve Passed the Carbon Tipping Point For Good
Atmospheric carbon levels are probably stuck at 400 parts per million, scientists say.
Iowa Democrats Call for a ‘WWII-Scale Mobilization’ to Fight Climate Change
The most ambitious plan to fight climate change out there has gained some backers in the land of the presidential primary.
There Hasn’t Been This Much Carbon in the Atmosphere for Millions of Years
So what did the climate look like back then?
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