Chemical compounds made up of nitrogen (N) and oxygen (O). These elements are found in the atmosphere naturally. As a result of burning fossil fuels, these elements combine into pollutants such as nitrogen dioxide (one atom of N and two of O) and nitrogen trioxide (one of N and three of O). Nitrogen oxides are a major component of acid rain and contributor to global warming. About 95 percent of the increased levels of nitrogen oxides found in our atmosphere today come from humans burning fossil fuels. The rest comes from natural sources such as volcanoes and the action of bacteria in soil. !-- google_ad_client = "pub-6700624969687881"; google_ad_width = 234; google_ad_height = 60; google_ad_format = "234x60_as"; google_ad_type = "text"; google_ad_channel ="7512561969"; google_color_border = "FFFFFF"; google_color_bg = "FFFFFF"; google_color_link = "448079"; google_color_url = "448079"; google_color_text = "414141";

(NOx). Gases consisting of one molecule of nitrogen and varying numbers of oxygen molecules. Nitrogen oxides are produced in the emissions of vehicle exhausts and from power stations. In the atmosphere, nitrogen oxides can contribute to formation of photochemical ozone (smog), can impair visibility, and have health consequences; they are thus considered pollutants.

Pollutants that can be a component of smog and also can contribute to acid rain. One of the criteria pollutants regulated by the 1990 Clean Air Act Amendments. Sources include automobiles and industrial point sources.

Highly reactive gases that contain nitrogen and oxygen and that are produced as exhaust emissions from internal-combustion engines.NOx is formed through the combination of nitrogen and oxygen due to the high temperatures in the internal-combustion process. NOx emissions are regulated by federal law.

NO and NO2: gaseous pollutants produced by the combustion of fuels.

In the combustion process, nitrogen from the air combines with oxygen to form nitrogen oxides.

Formed in the atmosphere, in the presence of sunlight, from motor vehicle exhaust and stationary sources such as refineries and power plants. This pollutant affects the upper and lower lobes of the lungs. Upper airway narrowing and deep lung membrane damage are short-term effects associated with nitrogen dioxide. Long-term effects of nitrogen dioxide exposure can lead to cellular destruction and thickening of the alveolar walls, impairing the normal transfer of oxygen.

A group of nitrogen-oxygen compounds formed when some of the nitrogen gas in air combines with oxygen during high-temperature combustion; they are a major category of air pollutants. Along with hydrocarbons, they are a primary factor in the production of ozone and other photochemical oxidants that are the most harmful components of photochemical smog. They also contribute to acid precipitation (see nitric acid). Major nitrogen oxides are nitric oxide, NO; nitrogen dioxide, NO2; and nitrogen tetroxide, N2O2

Nitrogen oxides, or NOx, is the generic term for a group of highly reactive gases, all of which contain nitrogen and oxygen in varying amounts. Many of the nitrogen oxides are colorless and odorless. However, one common pollutant, nitrogen dioxide (NO2) along with particles in the air can often be seen as a reddish-brown layer over many urban areas. Nitrogen oxides form when fuel is burned at high temperatures, as in a combustion process. The primary sources of NOx are motor vehicles, electric utilities, and other industrial, commercial, and residential sources that burn fuels. Learn More...

A product of burning fossil fuels, and major contributor to the formation of ozone in the lower atmosphere and the formation of acid rain and photochemical smog.

Chemical formula NOx. This covers the gases nitric oxide (chemical formula NO) and nitrogen dioxide (chemical formula NO2 ). Both can be toxic but nitrogen dioxide is considered to be of most concern for asthmatics. The main source of the gases in urban areas are motor vehicle exhaust and gas cookers and kerosene heaters indoors. The brown haze sometimes seen over cities is mainly nitrogen oxides. These gases are also partly responsible for the generation of ozone, when acted upon by sunlight in the presence of other chemicals. Although air pollution can cause irritating symptoms and increased asthma symptoms in some people, it is unlikely to be an important cause of asthma in Australia.

Gases formed in great part from atmospheric nitrogen and oxygen when combustion takes place under conditions of high temperature and pressure. Nitrogen oxides include nitric oxide (NO) and nitrogen dioxide (NO).

Chemical compounds formed during combustion comprising varying proportions of nitrogen and oxygen.

Consists of nitric oxide (NO) and nitrogen dioxide (NO2) and are reported as NOx on a NO2 mass basis.

Several air-polluting gases composed of nitrogen and oxygen which play an important role in the formation of photochemical smog. Nitrogen oxides are collectively referred to as "NOx", where "x" represents a changing proportion of oxygen to nitrogen. Internal combustion engines are significant contributors to the worldwide nitrogen oxide emissions. For the purpose of emission regulations, NOx is composed of colorless nitric oxide (NO), and the reddish-brown, very toxic and reactive nitrogen dioxide (NO2). Other nitrogen oxides, such as nitrous oxide N2O (the anesthetic "laughing gas"), are not regulated emissions.

Pollutant gases produced by burning fossil fuels.

collective term for nitric oxide (NO) and nitrogen dioxide (NO2).

Polluting gases formed from nitrogen. They are produced when fossil fuels are burnt.

gases produced during high-temperature combustion in motor vehicles and in power plant and industrial furnaces.

Any chemical compound of nitrogen and oxygen. Nitrogen oxides result from high temperature and pressure in the combustion chambers of automobile engines and other power plants during the combustion process. When combined with hydrocarbons in the presence of sunlight, nitrogen oxides form smog. A basic air pollutant; automotive exhaust emission levels of nitrogen oxides are regulated by law.

Generic term for all compounds of nitrogen and oxygen.

Nitrogen-based and oxygen-based compounds produced by combustion processes. NOX emissions contribute to acid rain and ground-level ozone (smog).

Gas produced in the combustion processes due to the oxygenation of nitrogen contained in both the fuel and the combusting air. In the presence of other pollutants they can determine, as precursors, the formation of photochemical smog in the atmospheres of large urban areas. Like SO2 (see) they can lead to the phenomenon of acid rain.

A group of gases that cause acid rain and other environmental problems, such as smog and eutrophication of coastal waters. Burning fossil fuels, such as coal and gasoline, releases NOx into the atmosphere. Various programs are reducing NOx emissions, including the Acid Rain Program and NOx cap and trade programs.

A group of gases that cause acid rain and other environmental problems, such as smog and eutrophication of coastal waters. Burning fossil fuels such as coal and gasoline releases NOx into the atmosphere. For more information, visit EPA's Air and Radiation Web site.

A family of highly reactive gases (including nitrogen dioxide, above) that form when fuel is burned at high temperatures. Emitted principally from motor vehicle exhaust and stationary sources such as electric power plants and industrial boilers.

A group of highly reactive gases that contain nitrogen and oxygen in varying amounts. Many of the nitrogen oxides are colorless and odorless. The common pollutant nitrogen dioxide (NO2) can often be seen combined with particles in the air as a reddish-brown layer over many urban areas. Nitrogen oxides are formed when the oxygen and nitrogen in the air react with each other during combustion. The formation of nitrogen oxides is favored by high temperatures and excess oxygen (more than is needed to burn the fuel). The primary sources of nitrogen oxides are motor vehicles, electric utilities, and other industrial, commercial, and residential sources that burn fuels.

Gases consisting of one atom of nitrogen and varying numbers of oxygen atoms. Nitrogen oxides are produced in the emissions of vehicle exhausts and from power stations. In the atmosphere, nitrogen oxides can contribute to formation of photochemical ozone (smog) which is a greenhouse gas.

Are nitrogen oxide and nitrogen dioxide, expressed as NOx

During combustion processes in furnaces and engines nitrogen oxides are produced from the nitrogen contained in the combustion air by means of oxidation at high temperatures. Nitrogen oxides include nitric oxide (NO) and nitrogen dioxide (NO2).

Various oxides of nitrogen are formed in the combustion of fossil fuels, such as gas, oil and coal. Some NOx is formed from the nitrogen bound in the fuel when it is combusted and some NOx (thermal NOx) is formed at high temperatures from the nitrogen in the air. NOx , in combination with volatile organic compounds (VOC) and sunlight, lead to the formation of ozone. Emissions of NOx are strictly regulated, monitored and enforced by local, state and federal environmental agencies to protect people, animals and vegetation.

Nitrogen oxide and nitrogen dioxide, together referred to as NOx. Same as oxides of nitrogen. Introduction Task Process Information resources Guidance Dr. Bravo Ms. Alarcón Dr. Sosa Dr. Soto Mr. Sanchez

Compounds of nitrogen and oxygen formed when fossil fuels burn.

The sum of nitric oxide (NO) and nitrogen dioxide (NO2). Nitrogen oxides react with volatile organic compounds in the presence of sunlight to form ground-level ozone.

Highly reactive gases formed when nitrogen in fuel or combustion air is heated to over 650C (1200 F) in the presence of oxygen or when bacteria in soil or water oxidize nitrogen-containing compounds.

A general term pertaining to compounds of nitric acid (NO), nitrogen dioxide (NO2), and other oxides of nitrogen. Nitrogen oxides are typically created during combustion processes, and are major contributors to smog formation and acid deposition. NO2 is a criteria air pollutant, and may result in numerous adverse health effects; it absorbs blue light, resulting in a brownish-red cast to the atmosphere and reduced visibility.

Nitrogen oxides are byproducts of nitrous oxide from fossil fuel combustion. They are called criteria pollutants (along with carbon monoxide, sulfur dioxide, nonmethane volatile organic compounds, lead, and particulates). They contribute to acid rain, smog, and respiratory problems, and have an indirect impact on global climate change.

Gases consisting of one molecule of nitrogen and varying numbers of oxygen molecules. Nitrogen oxides are produced, for example, by the combustion of fossil fuels in vehicles and electric power plants. In the atmosphere, nitrogen oxides can contribute to formation of photochemical ozone (smog), impair visibility, and have health consequences; they are considered pollutants.

nitrogen and oxygen combine to form different varieties of this compound. Each variety has a different number of oxygen atoms that have joined together with a nitrogen atom. (The 'x' at the end of NOx can stand for 1, 2, 3 or more oxygen atoms. That's why it's an 'x' and not a number.) When NOx is baked with VOCs in the hot summer sun, ground-level ozone is created. (Back to Ozone Action! Days)

a gas produced by burning fossil fuels in power plants or automobile engines. Nitrogen oxides are pollutants that contribute to the formation of smog. A nitrogen oxide allowance trading market exists across 11 US states under the US Clean Air Act. see also sulphur oxides

Gases that form when the nitrogen and oxygen in the atmosphere are burned with fossil fuels at high temperatures.

gases that form when nitrogen and oxygen combine, such when fossil fuels are burned at high temperatures or when lightning strikes.

A byproduct of burning fuels such as oil, coal, gas and wood in both stationary and transportation sources.

Nitrogen-oxygen compounds formed mostly from the burning of fossil fuels. Major sources of nitrogen oxides are the combustion of fossil fuels by motor vehicles and power plants. These emissions react with sunlight and volatile organic compounds to form ground-level ozone. They also react with water vapor to form nitric acid, a contributor to acid rain.

Formed when nitrogen (N2) combines with oxygen (O2) in the burning of fossil fuels and from the natural degradation of vegetation, and from the use of chemical fertilizers. A significant component of acid deposition and photochemical smog.

(NOx) a product of photochemical reactions of nitric oxide in ambient air which is the major component of photochemical smog.

Atmospheric pollutants consisting of one molecule of nitrogen and varying numbers of oxygen molecules. They are produced in the emissions of vehicle exhausts and from power stations.

A group of highly reactive gases that form when fuel burns at high temperatures. NOx emissions react with Hydrocarbons in the presence of sunlight to form ground-level ozone, a serious lung irritant.

formed in combustion; appear as yellowish-brown clouds; can irritate lungs, cause lung diseases, lead to formation of ozone (which is harmful in the lower atmosphere, but necessary as protection from UV rays in the upper atmosphere).

Mainly nitrogen monoxide (NO) and nitrogen dioxide (NO2). Nitrogen gases that are formed as emissions in combustion and, for example, in the manufacture of nitric acid. Nitric oxides cause acidification and impair air quality.

(NOx) Compounds of nitrogen and oxygen; released during fossil fuel burning.

A colorless, odorless gas that is a primary component in creating ground level ozone (SMOG). Main sources include automobiles and fossil burning power plants.

Burning fossil fuels, such as coal and gasoline, releases NOx into the atmosphere. Nitrogen oxide emissions contribute to the formation of ground level ozone, acid rain, nitrogen deposits in lakes and coastal waters, crop damage, and reduced visibility. Ground level ozone can cause premature mortality, reduced lung function and aggravate existing respiratory problems such as asthma. Major sources of NOx include oil refineries, power plants and automobiles.

Compounds of nitrogen and oxygen produced by the burning of fossil fuels.

Family of compounds in which nitrogen is bound to oxygen. The most abundant is nitrous oxide, formula N2O, which is relatively unreactive. Nitric oxide (NO) and nitrogen dioxide (NO2) are highly reactive, and are present in much lower amounts in the atmosphere. Together, NO and NO2 are classed as odd nitrogen, or active nitrogen.

Gases that form when nitrogen in the air reacts with oxygen.

A criteria air pollutant. Nitrogen oxides are produced from burning fuels, including gasoline and coal. Nitrogen oxides are smog formers, which react with volatile organic compounds to form smog. Nitrogen oxides are also major components of acid rain.

major air pollutants; forms when nitrogen combines with oxygen as a result of fuel combustion; gives smog its characteristic brown colour; major source: motor vehicles

gases formed in great part from atmospheric nitrogen and oxygen when combustion takes place under conditions of high temperature and high pressure; considered a major air pollutant and precursor of ozone

harmful gases (which contribute to acid rain and global warming) emitted as a byproduct of fossil fuel combustion.

A group of gases composed of nitrogen and oxygen which are formed during combustion. In damp air, nitrogen oxides are converted to nitric acid, which causes acid precipitation.

The products of all combustion processes formed by the combination of nitrogen and oxygen.

Are emissions that contribute to the formation of smog. According to the NYS Department of Environmental Conservation, the state has "hot spots" of ozone contamination that must be reduced in order to comply with federal standards.