Methane levels climbing

After a slowdown in the early 2000s, atmospheric methane concentrations have risen rapidly over the past decade, with five-year average growth rates now rivaling those seen in the 1980s.

Percent increase in atmospheric methane concentration compared to 1984 level

Based on annual global concentration averages. Data for 2021 is preliminary; data for recent years has been revised and is subject to further adjustments. Updated April 7, 2022.

Source: CNN analysis of NOAA Global Monitoring Laboratory data

Graphic: John Keefe, CNN