Nonpoint source pollutionNonpoint source (NPS) pollution refers to diffuse contamination (or pollution) of water or air that does not originate from a single discrete source. This type of pollution is often the cumulative effect of small amounts of contaminants gathered from a large area. It is in contrast to point source pollution which results from a single source. Nonpoint source pollution generally results from land runoff, precipitation, atmospheric deposition, drainage, seepage, or hydrological modification (rainfall and snowmelt) where tracing pollution back to a single source is difficult.
Non-methane volatile organic compoundNon-methane volatile organic compounds (NMVOCs) are a set of organic compounds that are typically photochemically reactive in the atmosphere—marked by the exclusion of methane. NMVOCs include a large variety of chemically different compounds, such as benzene, ethanol, formaldehyde, cyclohexane, 1,1,1-trichloroethane and acetone. Essentially, NMVOCs are identical to volatile organic compounds (VOCs), but with methane excluded. Methane is excluded in air-pollution contexts because it is not toxic.
Mobile source air pollutionMobile source air pollution includes any air pollution emitted by motor vehicles, airplanes, locomotives, and other engines and equipment that can be moved from one location to another. Many of these pollutants contribute to environmental degradation and have negative effects on human health. To prevent unnecessary damage to human health and the environment, environmental regulatory agencies such as the U.S. Environmental Protection Agency have established policies to minimize air pollution from mobile sources.
American Society of Heating, Refrigerating and Air-Conditioning EngineersL'American Society of Heating, Refrigerating and Air-Conditioning Engineers (plus connue sous le sigle ASHRAE) est une organisation internationale technique dans le domaine des génies thermiques et climatiques (chauffage, ventilation, air climatisé, production de froid). Fondée en 1894, elle tient deux réunions chaque année. Elle est notamment connue pour ses publications faisant référence. Exemples de quelques standards de l’ASHRAE : Standard 34 – Designation and Safety Classification of Refrigerants ; Standard 55 – Thermal Environmental Conditions for Human Occupancy ; Standard 62.
Mold health issuesMold health issues refer to the harmful health effects of moulds ("molds" in American English) and their mycotoxins. However, recent research has shown these adverse health effects are caused not exclusively by molds, but also other microbial agents and biotoxins associated with dampness, mold, and water-damaged buildings, such as gram-negative bacteria that produce endotoxins, as well as actinomycetes and their associated exotoxins.
