Carbon dioxide, methane levels in the atmosphere hit record highs last year
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The levels of carbon dioxide and methane in the atmosphere reached historic highs last year, growing at near-record fast paces, according to the U.S. National Oceanic and Atmospheric Administration. Carbon dioxide rose by the third highest amount in 65 years of record keeping, while methane levels jumped 5.5% over the past decade. Methane emissions are responsible for about 30% of the current rise in global temperature and trap about 28 times the heat per molecule as carbon dioxide. Nitrous oxide, another greenhouse gas, also reached record levels. The increases in greenhouse gases highlight the need for meaningful progress in reducing emissions.

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https://www.pbs.org/newshour/science/carbon-dioxide-methane-levels-in-the-atmosphere-hit-record-highs-last-year