A decade long surge of the potent
greenhouse gas methane threatens to make the fight against global warming even
harder, researchers warned on 12 December. Additional attention is urgently
needed to quantify and reduce methane emissions. After rising slowly from 2000
to 2006, the concentration of methane in the air climbed 10 times more quickly
the following decade, according to that study, published in the peer reviewed
Earth System Science Data. The largely unexplained – increase was especially sharp
in 2014 and 2015. Keeping global warming below 2°C is already a challenging
target. On current trends, average global temperatures are on track to jump by
more than 3°C by 2100, even if national carbon cutting pledges annexed to the
Paris Agreement are honored. Methane is 28 times more efficient at trapping the
Sun’s heat than CO2. About a third of human generated methane is a byproduct of
the fossil fuel industry, while two-thirds come from livestock production and
agriculture.
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