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 ...
Environmental Sciences Fair Projects Home
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.
Photochemical pollutants 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 Pollutant 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 pollutants, 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 pollutant 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 pollutants in the atmosphere.
point source A stationary source or fixed facility from which pollutants are discharged. Compare non-point source. pollutant Any substance introduced into the environment that adversely affects the usefulness of a resource.
internal loading nutrients or pollutants entering a body of water from its sediments
interstitial spaces small spaces between objects, i.e., such as the spaces between gravels, cobbles, or boulders, or between pieces of large woody debris (LWD).
Most NPS pollution comes from pollutants being washed into a waterbody by rainfall and snowmelt.
Certain kinds of air pollutants, like ozone, can make asthma and other lung conditions worse. Ozone found high in the atmosphere is called "good ozone" because it protects life on Earth from the sun's harmful ultraviolet rays.
Outside, while CO is produced naturally-by volcanic eruptions, for example-it is also a major pollutant.
The EPA's rationale for deregulating lead as an air pollutant is like a case study for convoluted logic.
Polluted runoff might result from pollutants getting into surface waters in the course of precipitation events. It's not as unheard of as you may think.
Stormwater Management - Water runs more quickly off hard surfaces than it does off unpaved surfaces, and when it runs over parking lots in particular it carries with it many pollutants.
Chapter 5 - Indoor Air Pollutants and Toxic Materials
Chapter 6 - Housing Structure
Chapter 7 - Environmental Barriers
Chapter 8 - Rural Water Supplies and Water-quality Issues
Chapter 9 - Plumbing
Chapter 10 - On-site Wastewater Treatment ...
Residual: The amount of a pollutant remaining in the environment after a natural or technological process has taken place, e.g.
National Pollutant Discharge Elimination System (NPDES)
National Pollutant Release Inventory or NPRI
National Priorities List or NPL
National Response Center or NRC
National Response System or NRS
National Response Team or NRT ...
Carbon Monoxide (n) - a pollutant that is produced primarily by motor vehicles. It can reduce a person's ability to think clearly, and causes visual impairment and headaches if high enough concentrations are experienced for a long period of time.
Unlike most conventional pollutants, GHGs mix well in the atmosphere and can travel around the planet quickly. As a result, it doesn't really matter from the standpoint of global warming mitigation where a reduction takes place.
Air Quality Standards
The level of selected pollutants set by law that may not be exceeded in outside air. Used to determine the amount of pollutants that may be emitted by industry. ...
Note that anthropogenic emissions of other pollutants - notably sulphate aerosol - exert a cooling effect; this can account for the plateau/cooling seen in the temperature record in the middle of the 20th century .
Alternative theories ...
Two common air pollutants acidify rain: sulphur dioxide and nitrogen oxide. When the environment cannot neutralize the acid being deposited, damage occurs.
(Environment Canada. Canadian Pollution Prevention Information Clearinghouse.
Strictly, too much of any substance in the wrong place or at the wrong time is a pollutant.
Smog - a dense, discolored radiation fog containing large quanities of soot, ash, and gaseous pollutants such as sulfur dioxide and carbon dioxide, responsible for human respiratory ailments.
Buoyant forces remove heat generated by occupants and equipment, as well as odors and pollutants, all of which stratify under the ceiling and are extracted from the space by return or exhaust fans.
Non-point Source: Diffuse, overland runoff containing pollutants. Includes runoff collected in storm drains.
Nymph: Immature form of insects such as stoneflies and mayflies that do not pupate.
An area which acts to minimize the impact of pollutants on the environment or public welfare. For example, a buffer zone is established between a compositing facility and neighboring residents to minimize odor problems.
Pollution Plume: an area of a stream or aquifer containing degraded water resulting from migration of a pollutant. It extends from the source of contamination to another point in the direction of the water flow.
acid rain - the precipitation of dilute solutions of strong mineral acids, formed by the mixing in the atmosphere of various industrial pollutants -- primarily sulfur dioxide and nitrogen oxides -- with naturally occurring oxygen and water vapor.
Assimilative Capacity - The ability of air, a natural body of water, or soil to effectively degrade and/or disperse chemical substances. If the rate of introduction of pollutants into the environment exceeds its assimilative capacity for these ...
Local Exhaust Ventilation - involves the capture of pollutants at the source.
Best available control technology An emission limitation, including a visible emissions standard, based on the maximum possible reduction of an air pollutant.
Billet A bar of steel or iron that is in an intermediate manufacturing stage.
Ozone Hole: a once-natural springtime thinning in stratospheric ozone over Antarctica, but now enlarged by CFCs and other pollutants into a hole the size of the Moon.
VOCs — Volatile Organic Compounds, which have high enough vapor pressures to significantly vaporize and enter the atmosphere, where they become pollutants ...
The collection, interpretation, and storage of information about gene and protein activity in order to identify toxic substances in the environment, and to help treat people at the greatest risk of diseases caused by environmental pollutants or ...
In the stratosphere, ozone has beneficial properties where it forms an ozone shield that prevents dangerous radiation from reaching the Earth's surface. Closer to the planet's surface, ozone is considered an air pollutant that adversely affects ...
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 and are considered pollutants.
See also: Environment, Air, Water, Environmental, Health