The National Oceanic and Atmospheric Administration (NOAA) said on Thursday that atmospheric methane continued rising in 2021, setting another new record for the second year in a row.
According to NOAA, the annual increase in atmospheric methane in 2021 was 17 parts per billion (ppb), the most since systematic monitoring began in 1983. Methane levels in the atmosphere averaged 1,895.7 parts per billion in 2021, a 162% increase over pre-industrial levels.
