In October 2021, 24 countries pledged to reduce methane emissions by 30% by 2030. Methane has been responsible for about half of the 1.1°C warming since the 1850s. This potent but short-lived greenhouse gas stays in the atmosphere for significantly less time than carbon dioxide, so reducing methane emissions should have a greater impact on slowing temperature increases. With this pledge, global warming could be reduced by an estimated 0.2°C by 2050. There is still plenty of work to be done, and the absence of an enforcement mechanism is unfortunate, but this pledge is another promising step forward.
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