Global greenhouse gas concentrations
CO2 concentration PPM
330
340
350
360
370
380
390
400
410
420
430
1980 Jan
1990 Jan
2000 Jan
2010 Jan
2020 Jan
CO2
CO2 average
1970 Jan
CH4 concentration PPB
1600
1650
1700
1750
1800
1850
1900
1950
1980 Jan
1990 Jan
2000 Jan
2010 Jan
2020 Jan
CH4
CH4 average
1970 Jan
N2O concentration PPB
300
305
310
315
320
325
330
335
340
1980 Jan
1990 Jan
2000 Jan
2010 Jan
2020 Jan
N2O
N2O average
1970 Jan
Source: Carbon Brief