Confirming need for protective national health-based air quality standards.
D000368:Aged; D000393:Air Pollutants / Q000009:adverse effects / Q000032:analysis; D000397:Air Pollution / Q000331:legislation & jurisprudence* / Q000517:prevention & control; D002648:Child; D006801:Humans; D014481:United States
D000393:Air Pollutants