[Air pollution in the USA].
D000383:Agriculture; D000397:Air Pollution / Q000032:analysis; D000401:Aircraft; D002248:Carbon Monoxide / Q000032:analysis; D002958:City Planning; D006358:Hot Temperature; D006801:Humans; D006838:Hydrocarbons / Q000032:analysis; D008452:Maximum Allowable Concentration; D009589:Nitrogen Oxides; D009787:Occupational Medicine; D012037:Refuse Disposal; D012906:Smoke; D013458:Sulfur Dioxide / Q000032:analysis; D014481:United States; D001335:Vehicle Emissions
D006838:Hydrocarbons; D009589:Nitrogen Oxides; D012906:Smoke; D001335:Vehicle Emissions; D013458:Sulfur Dioxide; D002248:Carbon Monoxide
Zagriaznenie vozdushnoĭ sredy v SSh.