Least Developed Countries and Island Nations Endorse 350 PPM Goal
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What Would It Take to Get Us Back to 350?Before the industrial revolution, the atmosphere contained 275ppm of carbon dioxide. But after 200 years of burning coal and burning oil, the atmosphere is now about 390ppm. To get it back down to 350, we need to dramatically cut our emissions.
In a scientific paper titled "Target atmospheric CO2: Where should humanity aim?", Dr. James Hansen argued that we need to get back to 350 as soon as possible. To do it, we need to stop building coal plants today and quickly phase out their use. By 2050, we need to be as close to zero emissions as possible.
The world's biggest emitters have not adopted the 350ppm goal. To do so would go much farther than they appear willing to go. The G8, which includes the US, did however recently agree to set a target of keeping temperature as far below a 2 degrees Celsius rise as possible.