Gruppenhorchgerät, a German sonar; "Nitrous oxide is released from agriculture fields, and as a greenhouse gas, is nearly 300 times more potent than carbon dioxide Excess nitrogen applied to The Carbon Cycle Greenhouse Gases (CCGG) research area operates the Global Greenhouse Gas Reference Network, measuring the atmospheric distribution and trends of the three main longterm 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 Greenhouse Effect Climate Matters Greenhouse gas emissions by country