Positron-Emission TomographyOtoacoustic Emissions, SpontaneousTomography, Emission-ComputedVehicle EmissionsFluorodeoxyglucose F18RadiopharmaceuticalsTomography, Emission-Computed, Single-PhotonGreenhouse EffectTime FactorsFluorine RadioisotopesSpectrometry, FluorescenceCarbon FootprintAir PollutantsMethaneMultimodal ImagingBrainTomography, X-Ray ComputedLongitudinal StudiesEnvironmental MonitoringVolatilizationAtmosphereCarbon RadioisotopesPentanesMagnetic Resonance ImagingFluorescent DyesReproducibility of ResultsGasolineSensitivity and SpecificityFluorescenceFossil FuelsLuminescenceNitrous OxideCerebrovascular CirculationPower PlantsVolatile Organic CompoundsCoalImage Processing, Computer-AssistedSpectrometry, X-Ray EmissionDenitrificationLuminescent MeasurementsFollow-Up StudiesCarbon DioxideProspective StudiesManureModels, TheoreticalAir PollutionOrganotechnetium CompoundsGasesCochleaTreatment OutcomePredictive Value of TestsEnergy-Generating ResourcesConservation of Energy ResourcesPhotonsRadioactive TracersRetrospective StudiesNitrogen RadioisotopesThallium RadioisotopesDiagnostic ImagingUnited StatesParticulate MatterIncinerationCarbonRacloprideCopper RadioisotopesOximesSoilRadioisotopesDeoxyglucoseTechnetium Tc 99m ExametazimeHemiterpenesGas, NaturalAgricultureGlobal WarmingTechnetium Tc 99m SestamibiTissue DistributionAmmoniaModels, BiologicalAlgorithmsEar CanalCohort StudiesAnalysis of VarianceTemperatureIodine RadioisotopesAcoustic Impedance TestsHousehold ArticlesKineticsRisk FactorsMolecular ImagingDisease ProgressionFertilizersPhantoms, ImagingPolycyclic Hydrocarbons, AromaticHydrocarbonsSeverity of Illness IndexMotor VehiclesMyocardial Perfusion ImagingAge FactorsHeartLinear Models