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| Subject | English | Swedish |
| environ. | nitrogen oxide | kväveoxid |
| environ. | nitrogen oxide A colorless gas that, at room temperature, reacts with oxygen to form nitrogen dioxide; may be used to form other compounds, NOx | kväveoxid |
| environ. | nitrogen oxides | kväveoxider |
| environ. | nitrogen oxides Oxides formed and released in all common types of combustion; they are formed by the oxidation of atmospheric nitrogen at high temperatures. Introduced into the atmosphere from car exhausts, furnace stacks, incinerators, power stations and similar sources, the oxides include nitrous oxide, nitric oxide, nitrogen dioxide, nitrogen pentoxide and nitric acid. The oxides of nitrogen undergo many reactions in the atmosphere to form photochemical smog | kväveoxider |
| chem. | oxide of nitrogen | kväveoxid |
| environ. | Protocol to the 1979 Convention on Long-range Transboundary Air Pollution, concerning the Control of Emissions of Nitrogen Oxides or their Transboundary Fluxes | protokollet till 1979 års konvention om långväga gränsöverskridande luftföroreningar angående kontroll av utsläppen av kväveoxider eller dessas gränsöverskridande flöden |