UN report raises ceiling for greenhouse gas pollution
STOCKHOLM (AP) — The U.N.'s environmental authority has quietly raised its assessment of the level at which global greenhouse gas emissions must peak to avoid dangerous climate change, as governments seek a new accord to fight global warming.
In its first four annual emissions reports in 2010-2013, the United Nations Environment Program said emissions must not exceed 44 billion tons in 2020 for the world to limit global warming to 2 degrees C (3.6 degrees F).
But with real-world emissions rising far beyond that level, UNEP has since last year downplayed its focus on 2020 as a make-or-break year for emissions reductions.
In this year's Emissions Gap report, a summary of which was released Friday, UNEP says the world can still reach the 2-degree target with emissions of 52 billion tons by 2020, which is just slightly below today's level.
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