‘July CO2’ continues dangerous rise: 51 straight years

August 20, 2009

‘July CO2’ continues dangerous rise: 51 straight years

Mauna Loa Observatory, Hawaii (USA) Atmospheric CO2 reached 387.81 parts per million (ppm) in the month of July 2009, according to scientific data released August 10, 2009, by the National Oceanic and Atmospheric Administration (NOAA) in the United States. At the same monitoring location, the Mauna Loa Observatory, atmospheric CO2 was 386.38 ppm one year earlier in July 2008. These rising levels are significantly higher than the natural range (~180 ppm to 300 ppm) that existed for at least 2.1 million years until the start of the industrial revolution. [reference]

Since the start of high-precision instrument monitoring at the Mauna Loa Observatory in 1958, the monthly mean concentration for July CO2 has been higher each year relative to the prior July. Carbon dioxide (CO2) is the chief human-made greenhouse gas that is responsible for global warming.


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