ESRL Global Monitoring Division - Global Greenhouse Gas ...
The Global Greenhouse Gas Reference Network measures the atmospheric distribution and trends of the three main long-term drivers of climate change, carbon dioxide (CO 2), methane (CH 4), and nitrous oxide (N 2 O), as well as carbon monoxide (CO) which is an important indicator of air pollution. The Reference Network is a part of NOAA's Earth System Research Laboratory in Boulder, Colorado.
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