air pollution

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air pol·lu·tion

contamination of air by smoke and harmful gases, mainly oxides of carbon, sulfur, and nitrogen, as from automobile exhausts, industrial emissions, or burning rubbish.
See also: smog.

air pollution

Etymology: L, polluere, to defile
contamination of the air by noxious fumes, aromas, or toxic chemicals.

air pollution

The presence in the air of substances suh as carbon monoxide (CO), NO2, ozone, particulate matter, and SO2, which are byproducts of human activities, and which have an adverse effect on health. Fine (diameter ≤2.5 µm) particles are derived primarily from the combustion of fossil fuels in transportation, manufacturing, and power generation, and are mixed with soot, acid condensates, nitrate and sulfate particles, and may pose a greater risk to health as they are generally more toxic and can be inhaled deeply into the lungs; there is a significant association between fine particulate air pollution and deaths from cardiopulmonary disease, lung cancer, and other causes.
Health effects of air pollution Respiratory complaints, restricted activity, chest discomfort, sore throats, eye irritation; CO and ozone are linked to heart malformations and heart valve defects.

air pol·lu·tion

(ār pŏ-lū'shŭn)
Contamination of air by smoke, particulate matter, and harmful gases, mainly oxides of carbon, sulfur, and nitrogen, as from automobile exhausts, industrial emissions, and burning rubbish.
See also: smog

air pollution

the presence of contaminants in the form of dust, fumes, gases or other chemicals in the atmosphere in quantities which adversely affect living organisms. See ACID RAIN.


the gaseous mixture that makes up the atmosphere. See also air sacs.

air capillaries
the minuscule vessels that connect the parabronchi in avian lungs, in which there are no blind-ended tubules.
air cell
the air-filled space between the internal and external shell membranes of a bird's egg.
air changes per hour
the standard measurements used to indicate the level of ventilation in a building especially with respect to removal of humidity, noxious gases and carbon dioxide.
air dried
said of feed that is dried in the open with only natural movement of air, e.g. conventional hay. Contains about 10% water.
air filtration
used as a means of reducing contamination inside a building, the efficiency depending on the pore size of the filter. A technique of some value when combined with temperature control in reducing the prevalence of pneumonia in calves in intensive veal producing units.
air flow rates
are important in assessing the suitability of a ventilating system in animal accommodation. Standards for suitable flow rates for different species and age groups for heating and cooling are available.
air gap technique
in radiography, a technique to reduce scatter of radiation by increasing the distance between the patient and the surface of the cassette.
air hunger
a distressing dyspnea affecting both inspiration and expiration which occurs in paroxysms; characteristic of diabetic acidosis and coma. Called also Kussmaul's respiration.
air movement
includes air changes voiding humidity and gases to the exterior plus movements within the space which facilitate cooling.
air passages
the combined air delivery system of the upper and lower respiratory tracts including nasal cavities, pharynx, laryngeal cavity, trachea, bronchi and bronchioles.
air pollution
contamination of the air with deleterious or esthetically unattractive chemical, physical or biological material. Usually reserved for pollutants generated by humans.
air pump
a small electrically driven appliance used to provide a constant stream of air bubbles to aquaria. The bubbles themselves add little oxygen to the water but the constant disturbance of the surface of the water does.
air quality
the determination of air flow rate, temperature, humidity, freedom from bacteria, solid particles, obnoxious effluvia and poisonous gases—especially hydrogen sulfide and methane from sullage pits under the animal accommodation.
air trapping
dilatation of alveoli without destruction of their walls.
air vesicles
extend radially from parabronchi in the lungs of birds and connect with air capillaries, in which gaseous exchange occurs with vascular capillaries.

Patient discussion about air pollution

Q. where would i find list of all the "clean" cities and the rates of air pollution ...?

A. i don't know about a list of "good" cities, but i know a list of the worse cities for Asthmatic people!-

More discussions about air pollution
References in periodicals archive ?
EPA approach to estimating ambient lead-related benefits may serve as a useful model for future analyses of air toxics with noninhalation exposure pathways.
The source for the largest share of air toxics in Lane County, 44 percent, is dispersed sources such as home wood stoves, dry cleaners and auto repair shops, LRAPA estimates.
The report emphasized that California needs to take the lead in regulating air toxics, as it has done with other air pollutants in the past.
In March 2000, the South Coast Air Quality Management District published results of the second Multiple Air Toxics Exposure Study, indicating an overall average cancer risk in the South Coast Air Basin of about 1,400 per 1 million due to diesel emissions.
According to EPA, air toxics baselines serve as fuel standards to reduce emissions of hazardous air pollutants from gasoline-powered vehicles.
AQMD officials said the numbers represent a wakeup call about the long-term health risks of air pollution, but they stressed that cancer-causing air toxics are on the decline.
Reducing emissions of GHGs and other air toxics and criteria pollutants is a major priority for OTAQ and this award reaffirms our role as a thought-leader on mobile source fuels and technologies, emissions, and related air quality and health impacts.
Environmental Protection Agency (EPA) has issued updates to pollution limits for new power plants under the mercury and air toxics standards, based on new information and analysis that became available to the agency after the rule was finalized.
We are especially disappointed in the passage of provisions to put on hold the Mercury and Air Toxics Standard for power plants.
Now a research team points to another health consideration, demonstrating that minority populations living in highly segregated metropolitan areas in the United States have higher estimated lifetime cancer risks from air toxics than whites [EHP 114:386-393; Morello-Frosch et al.
According to the governor, the California LEV program will help reduce hydrocarbon emissions in Rhode Island by 16 percent, air toxics emissions by 25 percent and greenhouse gas emissions by two percent, all by the year 2020.
Following up on this issue, Inside EPA, a news report covering EPA and environmental issues, wrote an article in April titled, "EPA Seeks Ways to Fix Foundry Air Toxics Technology Proposal.

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