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Nitrous oxide (N_2O) is one of six greenhouse gases listed up in the Kyoto Protocol, and it effects a strong global warming because of its much greater global warming potential (GWP), by 310 times over a 100-year time horizon, than CO_2. Although such N_2O emissions from both natural and anthropogenic sources occur, the latter can be controlled using suitable abatement technologies, depending on them, to reduce N_2O below acceptable or feasible levels. This paper has extensively reviewed the anthropogenic N_2O emission sources and their related compositions, and the state-of-the-art non-catalytic and catalytic technologies of the emissions controls available currently to representative, large N_2O emission sources, such as adipic acid production plants. Challengeable approaches to this source are discussed to promote establishment of advanced N_2O emission control technologies.