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Annex VI set the first global standards for the sulphur content of marine fuel oils and the emissions of nitrogen oxides NOx from new ship engines.

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Do symptoms resolve when the individual is not in the building? Do symptoms recur seasonally heating, cooling? Have co-workers, peers noted similar complaints? Remedial Air pollution chart 2 Appropriate persons -- employer, building owner or manager, building investigation specialist, if necessary state and local government agency medical epidemiologists and other public health officials -- should undertake investigation and analysis of the implicated building, particularly the design and operation of HVAC systems, and correct contributing conditions.

Persistence on the part of individuals and health care consultants may be required to diagnose and remediate the building problems. Comment The term "sick building syndrome" SBSfirst employed in the s, describes a situation in which reported symptoms among a population of building occupants can be temporally associated with their presence in that building.

Typically, though not always, the structure is an office building. Generally, a spectrum of specific and nonspecific complaints are involved. The key factors are commonality of symptoms and absence of symptoms among building occupants when the individuals are not in the building.

Sick building syndrome should be suspected when a substantial proportion of those spending extended time in a building as in daily employment report or experience acute on-site discomfort. If is important, however, to distinguish SBS from problems of building related illness.

The latter term is reserved for situations in which signs and symptoms of diagnosable illness are identified and can be attributed directly to specific airborne building contaminants. Legionnaires' Disease and hypersensitivity pneumonitis, for example, are building related illnesses. There has been extensive speculation about the cause or causes of SBS.

The ventilation system itself can be a source of irritants. Interior redesign, such as the rearrangement of offices or installation of partitions, may also interfere with efficient functioning of such systems. Another theory suggests that very low levels of specific pollutants, including some discussed in the preceding pages, may be present and may act synergistically, or at least in combination, to cause health effects.

Humidity may also be a factor: Other contributing elements may include poor lighting and adverse ergonomic conditions, temperature extremes, noise, and psychological stresses that may have both individual and interpersonal impact.

The prevalence of the problem is unknown.

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A World Health Organization report suggested that as many as 30 percent of new and remodeled buildings worldwide may generate excessive complaints related to indoor air quality In a nationwide, random sampling of U.

When SBS is suspected, the individual physician or other health care provider may need to join forces with others e. Both are known human carcinogens. Their carcinogenic effects are not immediate but are evident only years, even decades, after prolonged exposure.

Asbestos Once widely used in structural fireproofing, asbestos may be found predominantly in heating systems and acoustic insulation, in floor and ceiling tiles, and in shingles in many older houses. It was formerly used in such consumer products as fireplace gloves, ironing board covers, and certain hair dryers.

When asbestos-containing material is damaged or disintegrates with age, microscopic fibers may be dispersed into the air. Over as long as twenty, thirty, or more years, the presence of these fibers within the lungs may result in asbestosis asbestos-caused fibrosis of the lung, seen as a result of heavy occupational exposure 58, lung cancer and pleural or peritoneal cancer, or mesothelioma For lung cancer, the effect of tobacco smoking in combination with asbestos exposure appears to be synergistic by approximately fivefold Occupational exposure may also be associated with increased risk of gastrointestinal malignancies.

Attention should be focused on those populations with continual exposure and documented health effects, e. Products and materials containing asbestos are not necessarily so labeled. Construction professionals or state or local environmental agencies may inspect and analyze suspect materials.

Manufacturers of particular products may also be able to supply information. The risk of disease depends on exposure to airborne asbestos fibers. Average levels in buildings are low, and the risk to building occupants is therefore low. Removal of asbestos is not always the best choice to reduce exposure.

The EPA requires asbestos removal only in order to prevent significant public exposure and generally recommends an in-place management program when asbestos has been discovered and is in good condition Radon Radon is the second leading cause of lung cancer, following smoking.

Radon is odorless, colorless, and tasteless. It is a naturally occurring radioactive gas resulting from the decay of radium, itself a decay product of uranium. Radon in turn breaks down into radon decay products, short-lived radionuclides. These decay products, either free or attached to airborne particles, are inhaled, and further decay can take place in the lungs before removal by clearance mechanisms.

It is the emission of high-energy alpha particles during the radon decay process that increases the risk of lung cancer.Air pollution can further be classified into two sections- Visible air pollution and invisible air pollution.

Another way of looking at Air pollution could be any substance that holds the potential to hinder the atmosphere or the well being of the living beings surviving in it.

Top of Page. Diagnostic Checklist. It is vital that the individual and the health care professional comprise a cooperative diagnostic team in analyzing diurnal and other patterns that may provide clues to a complaint's link with indoor air pollution. AIR QUALITY FORECASTS AND HEALTH INFO View air quality forecast maps for: Wednesday, November 21 and 21 Noviembre – En Español; Thursday, November 22 and 22 Noviembre – En Español; Friday, November 23 and 23 Noviembre – En Español; Saturday, November 24 and 24 Noviembre – En Español; Sunday, November 25 and 25 Noviembre – En Español; Monday, .

The NASA Clean Air Study was led by the National Aeronautics and Space Administration in association with the Associated Landscape Contractors of America (ALCA). Its results suggest that certain common indoor plants may provide a natural way of removing toxic agents such as benzene, formaldehyde and trichloroethylene from the air, helping neutralize the effects of sick building syndrome.

AB Community Monitoring & Emissions Reduction Plans. In response to Assembly Bill (AB) (C. Garcia, ), the California Air Resources Board (ARB) established the Community Air Protection Program (Program).

The Air Quality Index (AQI) is a color-coded index EPA uses to communicate daily air pollution for ozone, particle pollution, NO 2, CO and SO 2.

A value in the unhealthy range, above the national air quality standard for any pollutant, is of concern first for sensitive groups, then for .

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