title: Atmosphere. Challenges of a lowered U.S. ozone standard.
authors.affiliation: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, USA. Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO 80305, USA. owen.r.cooper@noaa.gov.
authors.forename: Owen R
authors.initials: OR
authors.lastname: Cooper
authors.affiliation: Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO 80305, USA.
authors.forename: Andrew O
authors.initials: AO
authors.lastname: Langford
authors.affiliation: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, USA. Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO 80305, USA.
authors.forename: David D
authors.initials: DD
authors.lastname: Parrish
authors.affiliation: Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO 80305, USA.
authors.forename: David W
authors.initials: DW
authors.lastname: Fahey
mesh_terms: D000393:Air Pollutants / Q000592:standards*; D004784:Environmental Monitoring; D006801:Humans; D010126:Ozone / Q000592:standards*; D011315:Preventive Medicine; D014481:United States; D014484:United States Environmental Protection Agency
chemical_list: D000393:Air Pollutants; D010126:Ozone