Pollutant Standard Index (PSI)
Indicator of one or more pollutants that may be used to inform the public about the potential for adverse health effects from air pollution in major cities.
Source: Terms of the Environment ...
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Global Warming ...
A pollutant determined to be hazardous to human health and regulated under EPA's National Ambient Air Quality Standards.
A harmful substance emitted into the air, water or soil.
Energy that passes from a warm object to a cooler one, like energy from the Sun to the Earth - sunlight.
a chemical or substance that causes harm in the environment
see PCBs ...
Pollutant:  Anything which alters the physical, chemical, or biological properties of water making it harmful or undesirable for use.
Precipitation:  Water 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 ...
Any undesirable solid, liquid or gaseous matter in a solid, liquid or gaseous environmental medium.
Pollutant Pathways: Avenues for distribution of pollutants. In most buildings, for example, HVAC systems are the primary pathways, although all building components can interact to affect how air movement distributes pollutants.
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.
Unwanted chemicals or other materials found in the air. Pollutants can harm health, the environment and property. Many air pollutants 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) ...
Pollutant 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.
pollutant : Generally, any substance introduced into the environment that adversely affects the usefulness of a resource.
Air Pollutant - Any substance in air that could, in high enough concentration, harm humans, animals, vegetation or material. Pollutants 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 Pollutant: A material which is listed in appendix B to § 172.
Chemicals released directly into the air in a harmful form.
primary productivity ...
primary pollutants: Chemicals that are emitted into the environment. Compare with secondary pollutants.
Pollutants are, however, also dispersed by wind and are therefore not always limited to the basin. The Baltic Sea basin receives airborne pollutants from Western Europe and exports some to Russia and the Ukraine.
Particular chemical or form of energy that can adversely affect the health, survival, or activities of humans or other living organisms. See pollution.
UK Pollutant Release and Transfer Register (PRTR)
Environment Agency's Pollution Inventory (PI)
SEPA Scottish Pollutant 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 Pollutants can travel long distances from their source. During this transport, secondary pollutants 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 Pollutants- 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.
Another pollutant associated with climate change is sulfur dioxide, a component of smog. Sulfur dioxide and closely related chemicals are known primarily as a cause of acid rain.
4.1 Which pollutants are present in outdoor air?
4.2 What respiratory diseases can outdoor pollution lead to?
4.3 Does exposure to pollen lead to respiratory allergies?
The source document for this Digest states: ...
Pollutants generated in the atmosphere as a result of chemical reactions involving primary pollutants.
See Carbon Sink.
Primary Air Pollutant: a pollutant dumped directly into the air. (Photochemical smog is a secondary air pollutant: 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.
See also: Environment, Air, Water, Environmental, Health