Year
|
Value
|
Pollutant
|
1750
|
278.0
|
CO2 (PPM)
|
1755
|
278.0
|
CO2 (PPM)
|
1760
|
278.0
|
CO2 (PPM)
|
1765
|
278.0
|
CO2 (PPM)
|
1770
|
278.6
|
CO2 (PPM)
|
1775
|
279.3
|
CO2 (PPM)
|
1780
|
280.1
|
CO2 (PPM)
|
1785
|
280.8
|
CO2 (PPM)
|
1790
|
281.6
|
CO2 (PPM)
|
1795
|
282.3
|
CO2 (PPM)
|
1800
|
282.9
|
CO2 (PPM)
|
1805
|
283.4
|
CO2 (PPM)
|
1810
|
283.8
|
CO2 (PPM)
|
1815
|
284.0
|
CO2 (PPM)
|
1820
|
284.2
|
CO2 (PPM)
|
1825
|
284.3
|
CO2 (PPM)
|
1830
|
284.4
|
CO2 (PPM)
|
1835
|
283.8
|
CO2 (PPM)
|
1840
|
283.4
|
CO2 (PPM)
|
1845
|
283.9
|
CO2 (PPM)
|
1850
|
284.7
|
CO2 (PPM)
|
1855
|
285.4
|
CO2 (PPM)
|
1860
|
286.2
|
CO2 (PPM)
|
1865
|
286.9
|
CO2 (PPM)
|
1870
|
287.5
|
CO2 (PPM)
|
1875
|
288.7
|
CO2 (PPM)
|
1880
|
290.7
|
CO2 (PPM)
|
1885
|
293.0
|
CO2 (PPM)
|
1890
|
294.2
|
CO2 (PPM)
|
1895
|
294.8
|
CO2 (PPM)
|
1900
|
295.8
|
CO2 (PPM)
|
1905
|
297.6
|
CO2 (PPM)
|
1910
|
299.7
|
CO2 (PPM)
|
1915
|
301.4
|
CO2 (PPM)
|
1920
|
303.0
|
CO2 (PPM)
|
1925
|
305.0
|
CO2 (PPM)
|
1930
|
307.2
|
CO2 (PPM)
|
1935
|
309.4
|
CO2 (PPM)
|
1940
|
310.4
|
CO2 (PPM)
|
1945
|
310.1
|
CO2 (PPM)
|
1950
|
310.7
|
CO2 (PPM)
|
1955
|
313.0
|
CO2 (PPM)
|
1960
|
316.9
|
CO2 (PPM)
|
1965
|
320.0
|
CO2 (PPM)
|
1970
|
325.0
|
CO2 (PPM)
|
1975
|
331.3
|
CO2 (PPM)
|
1978
|
334.6
|
CO2 (PPM)
|
1979
|
336.74
|
CO2 (PPM)
|
1980
|
338.7
|
CO2 (PPM)
|
1981
|
339.74
|
CO2 (PPM)
|
1982
|
340.92
|
CO2 (PPM)
|
1983
|
342.47
|
CO2 (PPM)
|
1984
|
344.13
|
CO2 (PPM)
|
1985
|
345.47
|
CO2 (PPM)
|
1986
|
346.89
|
CO2 (PPM)
|
1987
|
348.46
|
CO2 (PPM)
|
1988
|
350.93
|
CO2 (PPM)
|
1989
|
352.57
|
CO2 (PPM)
|
1990
|
353.72
|
CO2 (PPM)
|
1991
|
355.15
|
CO2 (PPM)
|
1992
|
355.9
|
CO2 (PPM)
|
1993
|
356.63
|
CO2 (PPM)
|
1994
|
358.2
|
CO2 (PPM)
|
1995
|
360.23
|
CO2 (PPM)
|
1996
|
362.01
|
CO2 (PPM)
|
1997
|
363.17
|
CO2 (PPM)
|
1998
|
365.69
|
CO2 (PPM)
|
1999
|
367.81
|
CO2 (PPM)
|
2000
|
368.92
|
CO2 (PPM)
|
2001
|
370.38
|
CO2 (PPM)
|
2002
|
372.49
|
CO2 (PPM)
|
2003
|
375.08
|
CO2 (PPM)
|
2004
|
376.61
|
CO2 (PPM)
|
2005
|
378.97
|
CO2 (PPM)
|
2006
|
381.17
|
CO2 (PPM)
|
2007
|
382.89
|
CO2 (PPM)
|
2008
|
384.98
|
CO2 (PPM)
|
2009
|
386.42
|
CO2 (PPM)
|
2010
|
388.71
|
CO2 (PPM)
|
2011
|
390.57
|
CO2 (PPM)
|
2012
|
392.64
|
CO2 (PPM)
|
2013
|
395.49
|
CO2 (PPM)
|
2014
|
397.45
|
CO2 (PPM)
|
2015
|
399.58
|
CO2 (PPM)
|
2016
|
402.88
|
CO2 (PPM)
|
1750
|
719.01
|
CH4 (ppb)
|
1755
|
719.97
|
CH4 (ppb)
|
1760
|
720.93
|
CH4 (ppb)
|
1765
|
723.71
|
CH4 (ppb)
|
1770
|
726.5
|
CH4 (ppb)
|
1775
|
730.53
|
CH4 (ppb)
|
1780
|
734.57
|
CH4 (ppb)
|
1785
|
739.29
|
CH4 (ppb)
|
1790
|
744.01
|
CH4 (ppb)
|
1795
|
747.4
|
CH4 (ppb)
|
1800
|
750.8
|
CH4 (ppb)
|
1805
|
755.45
|
CH4 (ppb)
|
1810
|
760.11
|
CH4 (ppb)
|
1815
|
764.92
|
CH4 (ppb)
|
1820
|
769.73
|
CH4 (ppb)
|
1825
|
774.54
|
CH4 (ppb)
|
1830
|
779.35
|
CH4 (ppb)
|
1835
|
784.21
|
CH4 (ppb)
|
1840
|
789.06
|
CH4 (ppb)
|
1845
|
795.24
|
CH4 (ppb)
|
1850
|
801.42
|
CH4 (ppb)
|
1855
|
808.5
|
CH4 (ppb)
|
1860
|
815.59
|
CH4 (ppb)
|
1865
|
823.38
|
CH4 (ppb)
|
1870
|
831.18
|
CH4 (ppb)
|
1875
|
839.33
|
CH4 (ppb)
|
1880
|
847.48
|
CH4 (ppb)
|
1885
|
857.35
|
CH4 (ppb)
|
1890
|
867.22
|
CH4 (ppb)
|
1895
|
878.76
|
CH4 (ppb)
|
1900
|
890.3
|
CH4 (ppb)
|
1905
|
912.07
|
CH4 (ppb)
|
1910
|
935.46
|
CH4 (ppb)
|
1915
|
961.48
|
CH4 (ppb)
|
1920
|
990.23
|
CH4 (ppb)
|
1925
|
1020.2
|
CH4 (ppb)
|
1930
|
1049.05
|
CH4 (ppb)
|
1935
|
1076.54
|
CH4 (ppb)
|
1940
|
1102.4
|
CH4 (ppb)
|
1945
|
1128.83
|
CH4 (ppb)
|
1950
|
1161.73
|
CH4 (ppb)
|
1955
|
1207.03
|
CH4 (ppb)
|
1960
|
1262.97
|
CH4 (ppb)
|
1965
|
1328.47
|
CH4 (ppb)
|
1970
|
1403.19
|
CH4 (ppb)
|
1975
|
1483.57
|
CH4 (ppb)
|
1978
|
1532.77
|
CH4 (ppb)
|
1979
|
1549.53
|
CH4 (ppb)
|
1980
|
1566.28
|
CH4 (ppb)
|
1981
|
1583.48
|
CH4 (ppb)
|
1982
|
1600.69
|
CH4 (ppb)
|
1983
|
1617.89
|
CH4 (ppb)
|
1984
|
1635.09
|
CH4 (ppb)
|
1985
|
1652.29
|
CH4 (ppb)
|
1986
|
1669.49
|
CH4 (ppb)
|
1987
|
1680.66
|
CH4 (ppb)
|
1988
|
1698.83
|
CH4 (ppb)
|
1989
|
1710.52
|
CH4 (ppb)
|
1990
|
1709.33
|
CH4 (ppb)
|
1991
|
1729.07
|
CH4 (ppb)
|
1992
|
1731.05
|
CH4 (ppb)
|
1993
|
1735.65
|
CH4 (ppb)
|
1994
|
1741.66
|
CH4 (ppb)
|
1995
|
1747.1
|
CH4 (ppb)
|
1996
|
1749.86
|
CH4 (ppb)
|
1997
|
1753.94
|
CH4 (ppb)
|
1998
|
1762.43
|
CH4 (ppb)
|
1999
|
1772.33
|
CH4 (ppb)
|
2000
|
1774.07
|
CH4 (ppb)
|
2001
|
1772.95
|
CH4 (ppb)
|
2002
|
1773.14
|
CH4 (ppb)
|
2003
|
1777.41
|
CH4 (ppb)
|
2004
|
1775.44
|
CH4 (ppb)
|
2005
|
1774.55
|
CH4 (ppb)
|
2006
|
1776.4
|
CH4 (ppb)
|
2007
|
1781.75
|
CH4 (ppb)
|
2008
|
1789.94
|
CH4 (ppb)
|
2009
|
1793.63
|
CH4 (ppb)
|
2010
|
1796.84
|
CH4 (ppb)
|
2011
|
1803.42
|
CH4 (ppb)
|
2012
|
1810.33
|
CH4 (ppb)
|
2013
|
1815.44
|
CH4 (ppb)
|
2014
|
1824.4
|
CH4 (ppb)
|
2015
|
1834.63
|
CH4 (ppb)
|
2016
|
1842.4
|
CH4 (ppb)
|
1750
|
270.0
|
N2O (ppb)
|
1755
|
270.3
|
N2O (ppb)
|
1760
|
270.6
|
N2O (ppb)
|
1765
|
270.9
|
N2O (ppb)
|
1770
|
271.2
|
N2O (ppb)
|
1775
|
271.5
|
N2O (ppb)
|
1780
|
271.8
|
N2O (ppb)
|
1785
|
272.1
|
N2O (ppb)
|
1790
|
272.4
|
N2O (ppb)
|
1795
|
272.7
|
N2O (ppb)
|
1800
|
273.0
|
N2O (ppb)
|
1805
|
273.24
|
N2O (ppb)
|
1810
|
273.48
|
N2O (ppb)
|
1815
|
273.72
|
N2O (ppb)
|
1820
|
273.96
|
N2O (ppb)
|
1825
|
274.2
|
N2O (ppb)
|
1830
|
274.44
|
N2O (ppb)
|
1835
|
274.68
|
N2O (ppb)
|
1840
|
274.92
|
N2O (ppb)
|
1845
|
275.16
|
N2O (ppb)
|
1850
|
275.4
|
N2O (ppb)
|
1855
|
275.9
|
N2O (ppb)
|
1860
|
276.4
|
N2O (ppb)
|
1865
|
276.9
|
N2O (ppb)
|
1870
|
277.4
|
N2O (ppb)
|
1875
|
277.8
|
N2O (ppb)
|
1880
|
278.2
|
N2O (ppb)
|
1885
|
278.7
|
N2O (ppb)
|
1890
|
279.1
|
N2O (ppb)
|
1895
|
279.5
|
N2O (ppb)
|
1900
|
279.8
|
N2O (ppb)
|
1905
|
280.3
|
N2O (ppb)
|
1910
|
281.0
|
N2O (ppb)
|
1915
|
281.8
|
N2O (ppb)
|
1920
|
282.9
|
N2O (ppb)
|
1925
|
284.0
|
N2O (ppb)
|
1930
|
285.0
|
N2O (ppb)
|
1935
|
285.9
|
N2O (ppb)
|
1940
|
286.7
|
N2O (ppb)
|
1945
|
287.8
|
N2O (ppb)
|
1950
|
289.0
|
N2O (ppb)
|
1955
|
290.1
|
N2O (ppb)
|
1960
|
291.4
|
N2O (ppb)
|
1965
|
292.9
|
N2O (ppb)
|
1970
|
294.9
|
N2O (ppb)
|
1975
|
297.4
|
N2O (ppb)
|
1978
|
298.82
|
N2O (ppb)
|
1979
|
300.04
|
N2O (ppb)
|
1980
|
300.65
|
N2O (ppb)
|
1981
|
301.23
|
N2O (ppb)
|
1982
|
303.56
|
N2O (ppb)
|
1983
|
303.78
|
N2O (ppb)
|
1984
|
304.02
|
N2O (ppb)
|
1985
|
304.54
|
N2O (ppb)
|
1986
|
305.37
|
N2O (ppb)
|
1987
|
305.55
|
N2O (ppb)
|
1988
|
306.49
|
N2O (ppb)
|
1989
|
307.48
|
N2O (ppb)
|
1990
|
308.78
|
N2O (ppb)
|
1991
|
309.57
|
N2O (ppb)
|
1992
|
310.0
|
N2O (ppb)
|
1993
|
310.25
|
N2O (ppb)
|
1994
|
310.98
|
N2O (ppb)
|
1995
|
311.78
|
N2O (ppb)
|
1996
|
312.81
|
N2O (ppb)
|
1997
|
313.53
|
N2O (ppb)
|
1998
|
314.2
|
N2O (ppb)
|
1999
|
315.15
|
N2O (ppb)
|
2000
|
316.14
|
N2O (ppb)
|
2001
|
316.89
|
N2O (ppb)
|
2002
|
317.47
|
N2O (ppb)
|
2003
|
318.21
|
N2O (ppb)
|
2004
|
318.93
|
N2O (ppb)
|
2005
|
319.6
|
N2O (ppb)
|
2006
|
320.37
|
N2O (ppb)
|
2007
|
321.14
|
N2O (ppb)
|
2008
|
322.11
|
N2O (ppb)
|
2009
|
322.88
|
N2O (ppb)
|
2010
|
323.7
|
N2O (ppb)
|
2011
|
324.61
|
N2O (ppb)
|
2012
|
325.58
|
N2O (ppb)
|
2013
|
326.53
|
N2O (ppb)
|
2014
|
327.61
|
N2O (ppb)
|
2015
|
328.51
|
N2O (ppb)
|
2016
|
329.29
|
N2O (ppb)
|