[The United States Environmental Protection Agency has decided on a revision of the national environmental quality standards for ozone and particulate matter].
Hernández-Avila
M
M
D000393:Air Pollutants / Q000009:adverse effects / Q000592:standards*; D006801:Humans; D008800:Mexico; D010126:Ozone / Q000009:adverse effects / Q000592:standards*; D014481:United States; D014484:United States Environmental Protection Agency
D000393:Air Pollutants; D010126:Ozone