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What Are the Sources of Nitrogen Dioxide Emissions? As of 2020, human-made sources in the U.S. emit 7.64 million short tons of nitrogen oxides per year (down from 15 million short tons per year in ...
Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences (IUA-CAAS), Chengdu National Agricultural Science and Technology Center, Chengdu 610213, China ...
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