Air pollution part 3 Indoor pollution and health

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Air pollution part 3 Indoor pollution and health effects

Air pollution part 3 Indoor pollution and health effects

Indoor air pollution • Air pollutants can be 2 -100 times more concentrated inside

Indoor air pollution • Air pollutants can be 2 -100 times more concentrated inside buildings than outside. • Top four most dangerous: – – Tobacco smoke Formaldehyde (in building materials, treated furniture and upholstery) Radioactive radon-222 gas (seeps from underground) Very small fine and ultrafine particles (circulate in air) • World Health Organization: – Connection between poverty and environmental quality – Many people in developing countries burn wood, charcoal, dung, and coal indoors for heating and cooking – Poor ventilation and access to healthcare

Health effects © WHO Figure 19 -16 • • • Each year, air pollution

Health effects © WHO Figure 19 -16 • • • Each year, air pollution prematurely kills about 3 million people, mostly from indoor air pollution in developing countries. In the U. S. , the EPA estimates that annual deaths related to indoor and outdoor air pollution range from 150, 000 to 350, 000. According to the EPA, each year more than 125, 000 Americans get cancer from breathing diesel fumes.

Indoor air pollutants and their sources Chloroform Para-dichlorobenzene Tetrachloroethylene Formaldehyde 1, 1, 1 Trichloroethane

Indoor air pollutants and their sources Chloroform Para-dichlorobenzene Tetrachloroethylene Formaldehyde 1, 1, 1 Trichloroethane Styrene Nitrogen Oxides Benzo-a-pyrene Particulates Tobacco Smoke Asbestos Carbon Monoxide Radon-222 Methylene Chloride Fig. 19 -11, p. 453

Radioactive Radon • Radon-222, a radioactive gas found in some soils and rocks •

Radioactive Radon • Radon-222, a radioactive gas found in some soils and rocks • Can seep into some houses and increase the risk of lung cancer. Figure 19 -13 Sources and paths of entry for indoor radon-222 gas

Living "pollution": dust mites, mold spores, and mildew • Household dust mites that feed

Living "pollution": dust mites, mold spores, and mildew • Household dust mites that feed on human skin and dust, live in materials such as bedding and furniture fabrics. – Can cause asthma attacks and allergic reactions in some people. • Molds and mildews are sources of chronic allergies – Can cause headaches and aggravate asthma and other respiratory diseases Figure 19 -12