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: Generally, any substance introduced into the environment that adversely affects the usefulness of a resource.

A pollutant determined to be hazardous to human health and regulated under EPA's National Ambient Air Quality Standards.

An air which is neither a criteria nor hazardous , as described in the Clean Air Act, but for which new source performance standards exist.

National Pollutant Release Inventory or NPRI
Canada's National Pollutant Release Inventory compiles data on chemical substances released as pollutants by industrial facilities.


A harmful substance emitted into the air, water or soil.
Radiation
Energy that passes from a warm object to a cooler one, like energy from the Sun to the Earth - sunlight.

Pollutant
a chemical or substance that causes harm in the environment
Polychlorinated biphenyls
see PCBs ...

:  Anything which alters the physical, chemical, or biological properties of water making it harmful or undesirable for use.
PrecipitationWater received on Earth directly from clouds as rain, hail, sleet, or snow.

Pollutant: A contaminant at a concentration high enough to endanger the life of organisms.


Any substance introduced into the environment that adversely affects the usefulness of a resource.
Pollution Prevention ...

pollutant
Any undesirable solid, liquid or gaseous matter in a solid, liquid or gaseous environmental medium.

Pathways: Avenues for distribution of s. In most buildings, for example, HVAC systems are the primary pathways, although all building components can interact to affect how air movement distributes s.

Pollutant Pathways: Avenues for distribution of pollutants in a building. HVAC systems are the primary pathways in most building, however all building components interact to affect how air movement distributes pollutants.

s (pollution)
Unwanted chemicals or other materials found in the air. s can harm health, the environment and property. Many air s occur as gases or vapors, but some are very tiny solid particles: dust, smoke or soot.

Pollutant Standard Index (PSI)
Measure of adverse health effects of air pollution levels in major cities.(1) ...

Standards Index (PSI): A numerical index formerly used for reporting severity of air pollution levels to the general public.

Pollutant is, strictly, too much of any substance in the wrong place or at the wrong time.

Air - Any substance in air that could, in high enough concentration, harm humans, animals, vegetation or material. s may include almost any natural or artificial composition of matter capable of being airborne.

toxic pollutants Materials contaminating the environment that cause death, disease, and birth defects in organisms that ingest or absorb them. The quantities and length of exposure necessary to cause these effects can vary widely.

Marine : A material which is listed in appendix B to ยง 172.

primary pollutants: Chemicals that are emitted into the environment. Compare with secondary pollutants.

s are, however, also dispersed by wind and are therefore not always limited to the basin. The Baltic Sea basin receives airborne s from Western Europe and exports some to Russia and the Ukraine.

pollutant
Particular chemical or form of energy that can adversely affect the health, survival, or activities of humans or other living organisms. See pollution.
pollution ...

UK Release and Transfer Register (PRTR)
Environment Agency's Pollution Inventory (PI)
SEPA Scottish Release Inventory (SPRI)
UK-AIR website ...

Air pollutants for which standards for safe levels of exposure have been set under the Clean Air Act. Current criteria pollutants are sulfur dioxide, particulate matter, carbon monoxide, nitrogen oxides, ozone and lead.
Cumulative impact ...

Air s can travel long distances from their source. During this transport, secondary s such as acid rain and ozone are produced. Tree foliage may act as a filter, concentrating the pollution.

Air pollutants which are not covered by ambient air quality standards but which, as defined in the Clean Air Act, may reasonably be expected to cause or contribute to irreversible illness or death.

Toxic s- Materials that cause death, disease, or birth defects in organisms that ingest or absorb them. The quantities and exposures necessary to cause these effects can vary widely.

Secondary Pollutants
Pollutants generated in the atmosphere as a result of chemical reactions involving primary pollutants.
Sink
See Carbon Sink.

Primary Air : a dumped directly into the air. (Photochemical smog is a secondary air : it is chemically derived from primary pollution.) ...

The National Pollutant Discharge Elimination System (NPDES) is a permit program that controls water pollution by regulating point sources that discharge pollutants into waters of the United States.

Photochemical s Chemicals which react photochemically (in the presence of sunlight) to destroy ozone in the stratosphere.
...

Hazardous air pollutants-Air pollutants that may reasonably be expected to cause or contribute to irreversible illness or death as defined under the Clean Air Act.

NPI = National Inventory
nutrients = A substance that provides plants food, includes vitamins and minerals
NWC = National Water Commission; See NWC's Water Dictionary ...

NPDES: National Pollutant Discharge Elimination System. A federal permit authorized by the Clean Water Act, Title IV, which is required for discharge of pollutants to navigable waters of the United States, ...

Acid Rain Rain or any form of precipitation of dilute solutions of strong mineral acids, created by the mixing in the atmosphere of s, typically sulfur dioxide and nitrogen oxides compounds, ...

air toxics Generally defined as air pollutants known or suspected to cause cancer or other serious health problems. They also may disrupt reproductive processes, cause birth defects and can cause serious environmental and ecological problems.

Lifetime (atmospheric) The lifetime of a greenhouse gas refers to the approximate amount of time it would take for the anthropogenic increment to an atmospheric concentration to return to its natural level (assuming emissions cease) as ...

Near the ground, it is a pollutant that comes from car exhausts, irritating the lungs. ozone layer A thin layer of ozone high in the atmosphere that prevents high energy UV radiation from getting to earth.

photochemical smog Air pollution caused by chemical reactions among various substances and s in the atmosphere.

See also: See also: Air, Environment, Water, Waste, Environmental

Environment  Pollen  Pollutant pathways

 
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