While the world’s governments struggle to agree on emissions cuts that would keep atmospheric CO2 from exceeding 450 ppm, more climate experts are warning that even that target is too high.
British economist Nicholas Stern is the latest. Stern, whose 2006 Stern Review spelled out for the world the economic crises that would accompany climate change, recently told a reporter in
Germany that 350 ppm — rather than 450 ppm — would be “a very sensible long-term target.”
“It is most important to stop the increase of flows of emissions short term and then start the decline of flows of annual emissions and get them down to levels which will move concentrations of CO2 back down towards 350 ppm," Stern said.
The world has already exceeded 350 ppm, with atmospheric CO2 at about 388 ppm right now and rising.
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