nitrogen oxide


Definition of nitrogen oxide

: any of several oxides of nitrogen most of which are produced in combustion and are considered to be atmospheric pollutants: such as

Examples of nitrogen oxide in a Sentence

Recent Examples on the Web The Clarion-Ledger reported that an analysis by the Environmental Integrity Project found the plant’s small particulate matter, nitrogen oxide emissions and other air pollutants would cause Clean Air Act violations. William Thornton |, al, "Is biomass good for Alabama, the environment?," 12 Oct. 2019 Those include New York’s 1984 Acid Deposition Control Act and amendments to the US Clean Air Act requiring federal controls of sulfur dioxide and nitrogen oxide emissions., "The first verified example of recovery of an Adirondack lake rendered fishless by acid rain was Brooktrout Lake, where heritage strain trout were stocked in 2005 and found to be reproducing in 2010.," 9 Oct. 2019 Those include New York’s 1984 Acid Deposition Control Act and amendments to the U.S. Clean Air Act requiring federal controls of sulfur dioxide and nitrogen oxide emissions. San Diego Union-Tribune, "Trout found in Adirondack lake once soured by acid rain," 8 Oct. 2019 That upheaval was overshadowed in September 2015 when news broke that Volkswagen had installed software designed to defeat tests for nitrogen oxide emissions in diesel engines in the U.S. and, the company then said, in 11 million cars worldwide. Geir Moulson,, "Volkswagen patriarch, ‘an enthusiastic engineer and car lover until the end,’ dies at 82," 27 Aug. 2019 State data shows that the oil and gas industry stands out as the main source of the volatile organic compounds (172 tons per day) and of the nitrogen oxides (49 tons per day) that, mixing in sunlight, worsen ozone air pollution. Bruce Finley, The Denver Post, "Colorado proposes new controls on oil and gas industry in effort to combat air pollution," 29 July 2019 The study shows how the chemical ingredients of pollution — including sulfur dioxide, nitrogen oxides, black carbon, carbon monoxide and volatile organic compounds — react with each other and sunlight to create the deadly drift of PM2.5 and ozone. John Fialka, Scientific American, "Reducing China’s CO2 Emissions Would Curb Deadly Air Pollution in the U.S.," 26 July 2019 The first is Selective Catalytic Reduction (SCR) systems, which are specific to diesel engines and reduce the amount of nitrogen oxides (NOx) emitted by the vehicle. Megan Geuss, Ars Technica, "EU investigating German automakers, alleging collusion on emissions tech," 19 Sep. 2018 Pure oxygen can be added when burning fossil fuels for more efficient combustion, which would also eliminate nitrogen oxide byproducts (which are also greenhouse gases). Scott K. Johnson, Ars Technica, "Splitting water to make cement could clean up a dirty industry," 17 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nitrogen oxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of nitrogen oxide

1868, in the meaning defined above

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Statistics for nitrogen oxide

Last Updated

12 Nov 2019

Time Traveler for nitrogen oxide

The first known use of nitrogen oxide was in 1868

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something of little or no value

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