CO2 in 2009 was 387.35ppm - CO2NOW organisation. Need to get back to 350.
25/4/2010 CO2NOW.org In 2009, the average concentration for atmospheric CO2 (Mauna Loa Observatory) was 387.35 parts per million (ppm).In 2008, it was 385.57 ppm.
Since the 1958 start of precise CO2 measurements in the atmosphere, the annual mean concentration of CO2 has only increased from one year to the next. There have been no decreases in annual CO2 levels since direct instrument measurements began. The following CO2 data provides a snapshot of the longest-running, high-precision instrument record for atmospheric CO2:
Year CO2 (ppm) Notes
2009 387.35 Copenhagen Accord
2008 385.57 The latest year for which a full year of data is available
2007 383.71
2006 381.85
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1997 363.47 Kyoto Protocol
1992 356.27 Earth Summit in Rio de Janeiro
1987 348.98 The last year in which the annual CO2 data was less than 350 ppm
1959 315.98 The first year for which a full year of precise instrument data is available
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