01738oam 2200469I 450 991071333250332120200407141848.0(CKB)5470000002500320(OCoLC)1140644619(EXLCZ)99547000000250032020200206d2019 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierGuidance on regional haze state implementation plans for the second implementation periodResearch Triangle Park, North Carolina :U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Policy Division,2019.1 online resource (various pagings)"August 2019.""EPA-457/B-19-003."Includes bibliographical references.HazeStandardsUnited StatesAir qualityGovernment policyUnited StatesHazeEnvironmental aspectsUnited StatesAir qualityGovernment policyfastHazeEnvironmental aspectsfastUnited StatesfastHazeStandardsAir qualityGovernment policyHazeEnvironmental aspectsAir qualityGovernment policy.HazeEnvironmental aspects.United States.Environmental Protection Agency.Air Quality Policy Division,EKBEKBOCLCFGPOBOOK9910713332503321Guidance on regional haze state implementation plans for the second implementation period3297193UNINA