Air PollutantsParticulate MatterAir PollutionVehicle EmissionsParticle SizeNitrogen DioxideSulfur DioxideOzoneEnvironmental ExposureEnvironmental MonitoringInhalation ExposureAirRespiratory Tract DiseasesGasolineEpidemiological MonitoringSootAir Pollution, IndoorEnvironmental PollutantsWeatherCitiesAir FiltersMeteorological ConceptsUrban HealthDustOxidants, PhotochemicalAir Pollutants, OccupationalAir MicrobiologyCarbonVentilationMotor VehiclesPolycyclic Hydrocarbons, AromaticSeasonsEnvironmental HealthCarbon MonoxideWater PollutantsSmokeAsthmaUnited States Environmental Protection AgencyMortalityAir MovementsNitrogen OxidesWater Pollutants, ChemicalUrban PopulationAerosolsAtmosphere Exposure ChambersFiltrationLungGasesBostonSmogOccupational ExposureUtahOrganic ChemicalsPeak Expiratory Flow RateAcid RainSoil PollutantsNitric AcidHydrocarbonsLung DiseasesHazardous SubstancesVolatilizationCardiovascular DiseasesFossil FuelsCross-Over StudiesPulmonary Heart DiseaseRisk AssessmentMaternal ExposurePetroleumPolycyclic CompoundsBenzeneUnited StatesSulfur OxidesCarcinogens, EnvironmentalEpidemiologic StudiesTime FactorsSulfuric AcidsRegression AnalysisVolatile Organic CompoundsRespiration DisordersTillandsiaEmbolism, AirOxidative StressRisk FactorsHospitalizationMaximum Allowable ConcentrationPennsylvaniaHumidityPoisson DistributionChinaHydrocarbons, ChlorinatedIndustryCohort StudiesHeart RateFuel OilsExtraction and Processing IndustryLinear ModelsInflammationCaliforniaMetalsPolychlorinated Biphenyls