01764oam 2200445 450 991071370080332120200608152452.0(CKB)5470000002502661(OCoLC)1153269372(EXLCZ)99547000000250266120200428j202001 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierPolicy assessment for the review of the national ambient air quality standards for particulate matterResearch Triangle Park, NC :U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Health and Environmental Impacts Division,January 2020.1 online resource (534 unnumbered pages) color illustrations, charts"January 2020.""EPA-452/R-20-002."Includes bibliographical references.Air quality managementUnited StatesAir qualityStandardsUnited StatesParticlesEnvironmental aspectsUnited StatesParticlesHealth aspectsUnited StatesAirPollutionMeasurementAir quality managementAir qualityStandardsParticlesEnvironmental aspectsParticlesHealth aspectsAirPollutionMeasurement.United States.Environmental Protection Agency.Health and Environmental Impacts Division,EKBEKBGPOBOOK9910713700803321Policy assessment for the review of the national ambient air quality standards for particulate matter3252803UNINA