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- Nov 2024
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iopscience.iop.org iopscience.iop.org
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Global methane concentrations rose by 15, 18, 13, and 10 ppb each year from 2020 through 2023, respectively, the second, first, fourth, and fourteenth largest increases since the U.S. National Oceanic and Atmospheric Administration (NOAA) methane time series began in 1983 (Lan et al 2024).
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