| Year | Value | Polutant |
|---|---|---|
| 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 | 402.87 | CO2 (ppm) |
| 2017 | 405.19 | CO2 (ppm) |
| 2018 | 407.58 | 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) |
| 2017 | 1849.95 | CH4 (ppb) |
| 2018 | 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 | 329.33 | N2O (ppb) |
| 2017 | 330.31 | N2O (ppb) |
| 2018 | N2O (ppb) |