nitrogen dioxide


Definition of nitrogen dioxide

: a toxic reddish brown gas NO2 that is a strong oxidizing agent, is produced by combustion (as of fossil fuels), and is an atmospheric pollutant (as in smog)

Examples of nitrogen dioxide in a Sentence

Recent Examples on the Web The more recent 2017 Sentinel-5P measures greenhouse gas emissions like methane, nitrogen dioxide, and sulfur dioxide. Mark Johnson, Quartz, "What climate change looks like from outer space," 26 Sep. 2019 The Plume app is intuitive and quickly shows the levels of chemicals and nitrogen dioxide – plentiful in vehicle exhaust and even stir-fry smoke, and a likely culprit of everything from poor sleep to headaches. Jennifer Jolly, USA TODAY, "Air pollution inside my house could kill me. What are you breathing in at your home?," 15 Sep. 2019 The plants remaining in Vistra’s portfolio also emitted about 60% of the current fleet’s emissions of heat-trapping carbon dioxide and smog-forming nitrogen dioxide, the analysis found. Michael Hawthorne,, "A Texas company is closing 4 Illinois coal plants but plans to keep some of its dirtiest units running," 20 Aug. 2019 Of the six, three actually increased in 2017: carbon monoxide, nitrogen dioxide and two measures of particulate matter pollution. Seth Borenstein, The Denver Post, "Trump administration fact check: Environment, VA, Russia and jobs," 13 July 2019 Stuttgart and Dusseldorf are appealing lower-court rulings in favor of DUH that said bans on driving diesel cars must be considered as part of any plan to bring down levels of harmful nitrogen dioxide. Elisabeth Behrmann,, "How a German Court Case Could Accelerate Diesel's End," 21 Feb. 2018 Last year, the coal plants emitted 32,492 tons of sulfur dioxide and 17,330 tons of nitrogen dioxide, according to federal records. Michael Hawthorne,, "Illinois is moving away from coal, despite Trump bailout of struggling industry," 25 June 2019 More than two million Londoners live in areas that exceed legal limits for nitrogen dioxide -- NO2-- including more than 400,000 children under the age of 18, according to the mayor's office. Amy Woodyatt, CNN, "London mayor Sadiq Khan announces car-free day to tackle pollution crisis," 20 June 2019 Air-quality standards have also driven U.S. emissions of nitrogen dioxide down 50 percent in the same time period. National Geographic, "Acid rain, explained," 12 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nitrogen dioxide.' 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 dioxide

1869, in the meaning defined above

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The first known use of nitrogen dioxide was in 1869

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Statistics for nitrogen dioxide

Last Updated

22 Nov 2019

Cite this Entry

“Nitrogen dioxide.” The Dictionary, Merriam-Webster Inc., Accessed 14 December 2019.

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More Definitions for nitrogen dioxide

nitrogen dioxide


Medical Definition of nitrogen dioxide

: a poisonous strongly oxidizing reddish brown gas NO2

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