Leader of Keeling Curve measurement says temporary bump from El Niño could push atmospheric CO2 levels above symbolic threshold for good (dotearth.blogs.nytimes.com)
The atmosphere now contains 400 parts per million of carbon dioxide and has passed symbolic threshold, according to scientists using data from the Mauna Loa Observatory. (techtimes.com)
Leader of Keeling Curve measurement says temporary bump from El Niño could push atmospheric CO2 levels above symbolic threshold for good Continue reading Is This the Last Year Below 400? (scripps.ucsd.edu)