CO2 concentration exceeds 400 ppm, a record
According to NOAA, the rate of concentration of carbon dioxide in the atmosphere, in March exceeded 400 parts per million, the highest ever measured content. Yet, emissions have stagnated in 2014.
March 2014: 398.10 ppm (parts per million by volume). March 2015: 400.83 ppm. NOAA, the National Oceanic and Atmospheric Agency US, has announced a record. Every week, this rate is measured on Mauna Loa volcano in Hawaii, NOAA and establishes the monthly global content based on 40 sites worldwide. This is the first time the content of the atmosphere of carbon dioxide (carbon dioxide, or CO2) exceeds 400 ppm.
Yet, according to the IEA (International Energy Agency), as reported by the press NOAA, global emissions of carbon dioxide by fossil fuel combustion stagnated between 2013 and 2014. The atmospheric content has nevertheless increased by 2 25 ppm per year between 2012 and 2014, "the highest increase recorded over three years."
Since the beginning of the industrial age, the concentration of CO2 has increased by 120 ppm, "half of the increase occurring since the 1980s." According to James Butler, NOAA, "the elimination of approximately 80% of emissions from fossil fuels stop the progression of the atmospheric content of carbon dioxide, but it will not decrease and no further reduction would only do so slowly ".
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