CO2 levels reached new peak in 2015
Last year was the fourth consecutive year that carbon dioxide grew more than 2 ppm, NOAA scientists say.
http://www.csmonitor.com/Environment/2016/0311/CO2-levels-reached-new-peak-in-2015
"The levels of carbon dioxide in the Earth’s atmosphere increased at a record pace last year, widening concerns about the greenhouses gas’s contribution to global warming.
Measurements taken at National Oceanic and Atmospheric Administration's (NOAA) Mauna Loa Observatory in Hawaii showed that the annual growth rate of carbon dioxide jumped by 3.05 parts per million (ppm) in 2015.
NOAA’s announcement adds to a growing list of reminders for why countries across the world need to reduce their carbon emissions to mitigate the effects of global warming. Last year was the hottest on average since record-keeping began. The global average temperature for 2015 was 0.23 degrees Fahrenheit or 0.13 Celsius higher than 2014, which held the previous record, according to NASA.
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As of February, the average global atmospheric level of carbon dioxide was 402.59 ppm. This is a significant rise over pre-industrial times. Atmospheric carbon dioxide averaged about 280 ppm prior to 1800.
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