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At the 2021 Glasgow climate summit, more than 100 countries promised to slash emissions of a powerful greenhouse gas that leaks from oil and gas wells, landfills, and livestock.
Methane is the gas targeted by the Global Methane Pledge. Methane leaks from sources like oil and gas operations, decomposing waste in landfills, and livestock digestion, and molecule for molecule it traps substantially more heat than carbon dioxide over a short timeframe, though it also breaks down and leaves the atmosphere much faster, meaning cutting methane can deliver a relatively quick slowing of near-term warming.
Helium is an inert gas with no meaningful greenhouse effect and no link to oil wells or landfills, and radon is a naturally occurring radioactive gas linked to health risks in buildings rather than climate warming.
Because methane leaves the atmosphere relatively quickly compared to carbon dioxide, scientists see cutting it as one of the fastest available levers for slowing near-term warming, even though carbon dioxide reductions remain essential over the long run.
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