Abbreviation for all of the family of oxides of nitrogen.
A collective term for the nitrogen oxides formed during combustion. When precipitation occurs, they can contribute to the acidification of soil and water. NOx can also, together with hydrocarbons, react with sunlight to form ground-level ozone.
a mixture of nitrogen oxide gases
(NO2) A colorless, non-flammable gas with a sweetish odor, commonly known as “laughing gas,” and sometimes used as an anesthetic. Oceans and rainforests naturally produce nitrous oxide. Nitrous oxide is produced by a range of human activities including: nylon and nitric acid production; the use of fertilizers in agriculture, use of catalytic converters in cars and the burning of organic matter. As are carbon dioxide and methane, nitrous oxide is a greenhouse gas.
NO + NO2, two reactive forms of nitrogen that intercbange very rapidly with each other in the sunlit atmosphere. The amount of NOx is linked to NO2 and hence to formation of the ClONO2 reservoir.
Collective term for oxides of nitrogen (NO, NO2)
Collective symbol for nitrogen oxides; produced partly during combustion and partly by reaction between oxygen and nitrogen in the atmosphere. Present in flue gases and vehicle exhaust gases; form acids and nutrient compounds causing eutrophication
Oxides of nitrogen, primarily nitrogen oxide (NO) and nitrogen dioxide (NO2). These are produced in the combustion of fossil fuels, and can constitute an air pollution problem.
Oxides of nitrogen (e.g. nitric oxide and nitrogen dioxide). By-product gases resulting from the combustion of hydrocarbon fuels which can contribute to acidification and the creation of ground-level ozone.
Collective term for nitrogen oxides or oxides of nitrogen gases, such as NO and NO 2.
Nitrous oxides are among the pollutants responsible for acid rain. They are part of automobile emissions and are also produced during all high-temperature combustion operations requiring air. Air is composed mainly of oxygen and nitrogen, which can recombine as nitrous oxides. Replacing air with oxygen avoids creating nitrogen and thus the formation of these oxides.
Nitrogen Oxides including NO and NO
compounds formed of nitrogen and oxygen produced by soil bacteria, lightning, volcanoes, forest fires and burning of fossil fuels. A component of ground level ozone.
Nitrogen Oxide The result of photochemical reactions of nitric oxide in ambient air; major component of photochemical smog. Product of combustion from transportation and stationary sources and a major contributor to the formation of ozone and to acid deposition.
Nitrogen oxides (NOx) act as indirect greenhouse gases by producing the tropospheric greenhouse gas 'ozone' during their breakdown in the atmosphere.
Nitrogen Oxides, that type of vehicle emission that contributes to smog
The sum of nitrogen oxide (NO) and nitrogen dioxide (NO2) expressed as NO
see nitrogen oxide
Half the recipe of chemicals, along with VOCs, which when cooked by heat and sunlight makes up ground-level ozone; primarily created from combustion engines and point sources like power plants and industry.
Nitrous oxides (NO, NO, NO, etc.) come from high temperature combustion, such as in the internal combustion engine of cars, buses and trucks.
Oxides of nitrogen. These materials are common air pollutants and can be produced by burning fuels including gasoline and coal
any of several oxides of nitrogen
Oxides of nitrogen that are a chief component of air pollution that can be produced by the burning of fossil fuels. Also called nitrogen oxides.
Nitrogen oxides. Permanent nitrogen compounds, some of which destroy stratospheric ozone and some of which are â€˜â€˜greenhouseâ€(tm)â€(tm) gases that may contribute to global warming.
See Oxides of Nitrogen.
Oxides of nitrogen. They are at their worst when combustion is most efficient. They are produced because the air is 78 percent nitrogen. Combines with HC in sunlight to form photochemical smog. NOx emissions can be reduced by lowering peak combustion temperatures through lowering compression ratios and by recirculating exhaust gases.
Oxides of Nitrogen â€“ One of the precursors of ozone (smog). The CAP (see p. 3) seeks to control these products of combustion to meet both state and federal ozone levels.
Nitrogen oxides - Byproducts of combustion that contribute to acid rain production.
Nitrogen oxides produced from combustion.
Nitrogen oxides Nitrous oxide (N 0), formed during combustion processes is a greenhouse gas and contributes to global warming
nitrogen oxides; The term used to describe the sum of nitric oxide (NO), nitrogen dioxide (NO2) and other oxides of nitrogen which play a major role in the formation of ozone, particulate matter, haze, and acid rain. Diesel engines are one of the primary sources of transportation-based NOx.
A highly toxic gas, found in the emissions (exhaust) from engines, and is measured in grams per hour. this gas is limited to certain levels by EPA, and can have further reductions by use of a catalytic converter, placed in exhaust outlets.
nitrogen oxides NO2 nitrogen dioxide (Criterion Pollutant. Health Effects: Lung irritation; reduced resistance to respiratory infection; continued or frequent exposure in children may cause higher incidence of acute respiratory disease in children. Non-Health Effects: contributes to ozone formation and acidic precipitation, which affect terrestrial and aquatic ecosystems.) O3 ozone (Criterion Pollutant. Health Effects: reduced lung functioning, damage to lung tissue; increased sensitivity of the lung to other irritants. Non-health Effects: Reduction in crop yields, damage to trees, damage to ecosystems.) Pb lead (Criterion Pollutant. Health Effects: damage to kidneys, liver, nervous system, and blood-forming organs; changes in fundamental enzymatic, tenergy transfer, and homeostatic mechanisms in the body; particularly harmful for fetuses, infant and children who may suffer damage to the central nervous system (e.g. seizures, mental retardation, behavioral disorders).
total oxides of nitrogen (a 'low-NOx' gas heater is designed to emit reduced quantities of NOx)
Nitrous oxides contained in exhaust emissions.
oxides of nitrogen; gases that cause acid rain and poor local air quality
oxides of nitrogen are formed when nitrogen combines with oxygen during the combustion of fossil fuels. Other sources are the natural degradation of vegetation and the use of chemical fertilizers. Oxides of nitrogen affect visibility and lead to ozone formation. For monitoring purposes nitrogen oxides are considered to be the sum of nitric oxide and nitrogen dioxide.
Oxides of Nitrogen (Excluding Nitrous Oxide)
Nitrogen Oxide (Air Quality)
Oxides of Nitrogen. A general term for compounds* of nitrogen oxide (NO), nitrogen dioxide (NO2) and other nitrogen oxides. Oxides of nitrogen are typically created during the combustion process, and are major contributors to smog formation and acid deposition.
Abbreviation for various oxides of nitrogen, including NO ( nitric oxide), NO2 ( nitrogen dioxide), or N2O ( nitrous oxide). These gaseous pollutants can be transformed in the presence of water to nitric acid HNO3, one of the acids in acid deposition. They are formed anthropogenically inside combustion engines, where the ambient nitrogen N2 and oxygen O2 gases in the atmosphere can react at high temperatures. They are also produced naturally by lightning and by biological activity in soils. See active nitrogen.
Nitrogen Oxides, gases which are released mainly during incineration and which result in acidification.
Oxides of nitrogen (NOx) are a family of reactive gaseous compounds that contribute to air pollution in both urban and rural environments. NOx emissions are produced during the combustion of fuels at high temperatures. The primary sources of atmospheric NOx include highway sources (such as light-duty and heavy-duty vehicles), nonroad sources (such as construction and agricultural equipment, and locomotives) and stationary sources (such as power plants and industrial boilers). NOx can irritate the lungs, cause bronchitis and pneumonia, and lower resistance to respiratory infections. Nitrogen oxides are an important precursor both to ozone and acid rain, and may affect both terrestrial and aquatic ecosystems.
Nitrogen Oxide. Gas associated with acid rain and ground level ozone.
Generic chemical abbreviation for Nitrous Oxides. Known to aggravate asthma, react with air to produce ozone, and acid rain when dissolved in water.
Oxides of Nitrogen. A common toxic pollutant emitted by petrol and diesel engines at higher temperatures.
Various nitrogen oxide gases that are precursors of smog.
Nitrogen oxides; ozone precursors that are found in emissions from automobiles, electric generating plants, lawn mowers and tractors. NOx react with VOC s during summer days to form ozone when there is a combination of high temperatures, low humidity and stagnant air.
range of compounds formed by the oxidation of atmospheric nitrogen. Some of these oxides contribute to acid rain and photochemical smog. Nitrogen dioxide is a major factor in photochemical ozone formation.
Nitrogen oxides, a group of gases released by fossil fuel combustion, forest fires, lightning, and decaying vegetation. NO2 nitrogen dioxide, a reddish brown gas with an irritating odour, is one of the key ingredients in smog.
Any combination of nitrogen and oxygen in a compound form. The most common in terms of environmental considerations is NO, which constitutes 90% of combustion NOx emissions, and NO2. All NO is eventually converted to NO2 in the atmosphere. Hence, most regulations are written to assume that the NOx which is emitted is in the form of NO2. Nox emissions are influenced by many factors, including furnace temperature, flame temperature, burner design, combustion air temperature, nitrogen content of liquid fuels, ammonia content of gas fuels, and other factors.
Oxides of nitrogen, not to be confused with nitrous oxide (N2O).
Oxides of nitrogen. A chief component of air pollution caused by burning fossil fuel.