Source:http://linkedlifedata.com/resource/umls/id/C0001873
MSH: The presence of contaminants or pollutant substances in the air (AIR POLLUTANTS) that interfere with human health or welfare, or produce other harmful environmental effects. The substances may include GASES; PARTICULATE MATTER; or volatile ORGANIC CHEMICALS.,CSP: presence of contaminants or pollutant substances in the air that interfere with human health or welfare, or produce other harmful environmental effects.,MEDLINEPLUS: <p>Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. <a href='http://www.nlm.nih.gov/medlineplus/ozone.html'>Ozone</a>, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog.</p><p>Some air pollutants are poisonous. Inhaling them can increase the chance you'll have health problems. People with heart or lung disease, older adults and children are at greater risk from air pollution. Air pollution isn't just outside -