Changeset 13285 in main
- Timestamp:
- 03/02/17 09:12:05 (5 years ago)
- File:
-
- 1 edited
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adopters/ut/trunk/src/main/webapps/ibisph-content/xml/query/module/pm2.5/overview/PM2.5.xml
r13283 r13285 2 2 <OVERVIEW> 3 3 <TITLE>Overview</TITLE> 4 <TEXT> Fine particulate matter (PM^2.5^) is defined as particles with a diameter smaller than 2.5 micrometers (um, or microns). PM^2.5^ canget deep inside the lungs and cause a variety of symptoms, such as painful breathing, chest tightness, headache, and coughing. PM^2.5^ can exacerbate respiratory infections, trigger asthma attacks and symptoms, and cause temporary reductions in lung capacity. Respiratory symptoms are more likely to occur when PM^2.5^ levels exceed the EPA's standard, but are possible when PM^2.5^ levels are below the standard, especially in sensitive populations. PM^2.5^ has been found in some studies to be associated with an increased risk of chronic lung disease^1^. The EPA recommends an annual PM2.5 standard of less than 12 micrograms per cubic meter. </TEXT>4 <TEXT> Fine particulate matter (PM^2.5^) is defined as particles with a diameter smaller than 2.5 micrometers (um, or microns). Because of its small size, PM2.5 is able to get deep inside the lungs and cause a variety of symptoms, such as painful breathing, chest tightness, headache, and coughing. PM^2.5^ can exacerbate respiratory infections, trigger asthma attacks and symptoms, and cause temporary reductions in lung capacity. Respiratory symptoms are more likely to occur when PM^2.5^ levels exceed the EPA's standard, but are possible when PM^2.5^ levels are below the standard, especially in sensitive populations. PM^2.5^ has been found in some studies to be associated with an increased risk of chronic lung disease^1^. The EPA recommends an annual PM2.5 standard of less than 12 micrograms per cubic meter. </TEXT> 5 5 6 6 <TEXT> In addition to these adverse outcomes, PM^2.5^ can influence the environment in ways that will eventually affect human health. Fine particles cause haze which reduces visibility. The long-term effects of PM^2.5^, which settles in the soil, natural water sources, forests, and agricultural areas, are still to be determined. </TEXT>
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