The atmospheric methane burden is increasing rapidly, contrary to pathways compatible with the goals of the 2015 United Nations Framework Convention on Climate Change Paris Agreement. Urgent action is required to bring methane back to a pathway more in line with the Paris goals. Emission reduction from “tractable” (easier to mitigate) anthropogenic sources such as the fossil fuel industries and landfills is being much facilitated by technical advances in the past decade, which have radically improved our ability to locate, identify, quantify, and reduce emissions. Measures to reduce emissions from “intractable” (harder to mitigate) anthropogenic sources such as agriculture and biomass burning have received less attention and are also becoming more feasible, including removal from elevated‐methane ambient air near to sources. The wider effort to use microbiological and dietary intervention to reduce emissions from cattle (and humans) is not addressed in detail in this essentially geophysical review. Though they cannot replace the need to reach “net‐zero” emissions of CO₂, significant reductions in the methane burden will ease the timescales needed to reach required CO₂ reduction targets for any particular future temperature limit. There is no single magic bullet, but implementation of a wide array of mitigation and emission reduction strategies could substantially cut the global methane burden, at a cost that is relatively low compared to the parallel and necessary measures to reduce CO₂, and thereby reduce the atmospheric methane burden back toward pathways consistent with the goals of the Paris Agreement.

中文翻译：

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减缓甲烷：减少排放的方法，迈向《巴黎协定》

与符合2015年《联合国气候变化框架公约》巴黎目标的目标相适应的途径相反，大气中的甲烷负担正在迅速增加。需要采取紧急行动，将甲烷带回到更符合巴黎目标的途径。过去十年来的技术进步大大促进了来自“易处理”（易于缓解）人为源（例如化石燃料行业和垃圾填埋场）的排放，这些技术从根本上提高了我们定位，识别，量化和减少排放的能力。减少诸如农业和生物质燃烧之类的“难处理”（难以缓解）人为源排放的措施受到的关注较少，并且也变得越来越可行，包括从源头附近的高甲烷环境空气中清除。在本质上是地球物理的综述中，并未详细介绍使用微生物和饮食干预措施来减少牛（和人类）的排放的更广泛的努力。尽管它们无法替代实现二氧化碳“净零排放”的需求_{如图2所示}，甲烷负荷的显着减少将减轻达到任何特定未来温度限制所需的CO ₂还原目标所需的时间范围。没有单一的魔术子弹，但是实施多种减排和减排策略可以大大减少全球甲烷负担，与同时采取必要措施减少CO ₂相比，其成本相对较低，从而减少了二氧化碳排放。大气中的甲烷负担又回到符合《巴黎协定》目标的途径。