Toxification of the atmosphere through the addition of one or more harmful substances in the air. Substance must be in concentrations high enough to be hazardous to humans, other animals, vegetation, [..]

Presence of substances in the atmosphere resulting either from human activity or natural processes, in sufficient concentration, for a sufficient time and under circumstances such as to interfere with [..]

The general term referring to the undesirable addition of substances (gases, liquids, or solid particles) to the atmosphere that are foreign to the natural atmosphere or are present in quantities exce [..]

Unwanted particles, mist or gases put into the atmosphere as a result of motor vehicle exhaust, the operation of industrial facilities or other human activity.

Pollution atmosphérique

harmful chemicals in the atmosphere. Read more in the NG Education Encyclopedia

The presence of substances in the atmosphere, particularly those that do not occur naturally. These substances are generally contaminants that substantially alter or degrade the quality of the atmosph [..]

sulfur oxides and particulates from industrial plants burning fossil fuels are the current worst forms of air pollution. Auto emissions run a close second. Most air pollution derives in one form or another from the use of petroleum products, oil in particular. See Oil below.

Refers to the contamination of the atmosphere by noxious substances. (See also Depletion, Environment, and Pollution.)

Particulate and gaseous air contaminants (sulfur dioxide, ozone, nitrogen dioxide, and chlorides) are ubiquitous, especially in urban areas where industry and transportation are heaviest. Difficult an [..]

contamination of the atmosphere by the introduction of pollutants from human and natural sources. air pressure -

Contamination of the air by smoke, smog, carbon, nitrogen and sulfurs.

The presence of one or more contaminants in the atmosphere in sufficient quantity and/or for sufficient duration to potentially impact human and/or environmental health. EPA defines standards for seve [..]

The presence of substances in the atmosphere resulting either from human activity or natural processes, present in sufficient concentration, for a sufficient time and under circumstances such as to in [..]

The presence of contaminants or pollutant substances in the air that interfere with human health or welfare, or produce other harmful environmental effects.

The presence of contaminants or pollutant substances in the air that interfere with human health or welfare, or produce other harmful environmental effects.

The presence of contaminants or pollutant substances in the air that interfere with human health or welfare, or produce other harmful environmental effects.

A broad term covering all effects on the natural atmosphere, including particulate matter, carbon monoxide and other chemical pollutants, and sometimes noise or light.

is the degradation of air quality resulting from unwanted chemicals or other materials occurring in the air.

The presence of contaminants or pollutant substances in the air (Air Pollutants) that interfere with Human Health or welfare, or produce other harmful environmental effects. The substances may include [..]

The contamination of indoor air.

Contamination of the air by Tobacco smoke.

Air is made up of a number of gases, mostly nitrogen and oxygen and, in smaller amounts, water vapour, carbon dioxide and argon and other trace gases. Air pollution occurs when harmful chemicals and p [..]

The contamination of indoor air.

The existence in the air of substances in concentrations that are determined unacceptable. Contaminants in the air we breathe come mainly from manufacturing industries, electric power plants, automobi [..]

Degradation of air quality resulting from unwanted chemicals or other materials occurring in the air. (See also air pollutants

The contamination of the atmosphere by any toxic or radioactive gases and particulate matter as a result of human activity. [Environmental Science and Technology; v28; 1633-1649; 1994.] [New Scientist [..]

The air we breathe is contaminated with air pollution. Air pollution can be both of particle matter or gaseous matter. Particle matter include dust, pollen, pet dander, allergens, dust mites and their feces, bacteria, virus, fungus and mold spores and other lung damaging particles. Gaseous matter includes e.g. traffic exhaust smoke, VOCs, odors, fo [..]

airborne gaseous

The contamination of indoor air. (12 Dec 1998)

the presence of polluting gases and suspended particles in the atmosphere in excess of air quality standards

A term used to describe any unwanted chemicals or other materials that contaminate the air that we breathe resulting in the degradation of air quality. Ammonia (NH3

The soiling of the atmosphere by contaminants to the point that may cause injury to health, property, plant, or animal life, or prevent the use and enjoyment of the outdoors.

Degradation of air quality resulting from unwanted chemicals or other materials occurring in the air.

The existence in the air

the modification of the natural characteristics of the atmosphere by a chemical, particulate matter, or biological agent.

Content of a gas , liquid or particles suspended in the ambient air that could affect life or a negative impact on humans, plans and animals.

The soiling of the atmosphere by contaminants to the point that may cause injury to health, property, plant, or animal life, or prevent the use and enjoyment of the outdoors.

The soiling of the atmosphere by contaminants to the point that may cause injury to health, property, plant, or animal life, or prevent the use and enjoyment of the outdoors.

The soiling of the atmosphere by contaminants to the point that may cause injury to health, property, plant, or animal life, or prevent the use and enjoyment of the outdoors.

The soiling of the atmosphere

The soiling of the atmosphere by contaminants to the point that may cause injury to health, property, plant, or animal life, or prevent the use and enjoyment of the outdoors.

The contamination of the atmosphere by noxious gases and particulates.