Outdoor air pollution: possible health effects.
D000328:Adult; D000397:Air Pollution / Q000009:adverse effects*; D002648:Child; D004781:Environmental Exposure / Q000517:prevention & control* / Q000592:standards; D006801:Humans; D010353:Patient Education as Topic; D014481:United States; D014484:United States Environmental Protection Agency / Q000592:standards