Atmospheric concentration of methane

Parts per billion

1,950

1,900

1,850

1,800

1,750

1,700

1,650

1,600

1990

2000

2010

2020

1,950

1,900

1,850

1,800

1,750

1,700

1,650

1,600

1990

2000

2010

2020

Guardian graphic. Source: WMO’s Greenhouse Gas Bulletin