Atmospheric CO2

Parts per million

440

Nov 2023

420.3ppm

400

360

350ppm

Safe level for CO2

in the atmosphere

320

280

1960

1980

2000

2020

Atmospheric CO2

Parts per million

440

Nov 2023

420.3ppm

400

360

350ppm

Safe level for CO2 in the atmosphere

320

280

1960

1970

1980

1990

2000

2010

2020

Guardian graphic. Source: Noaa, global CO2, updated 20 November 2023. Note: chart baseline is 280ppm - the preindustrial average