Resources Resources such as documents, research, data, and other tools related to the activities of the California Air Resources Board are available from this page. Use the following general categories or the search tool below. Resource DirectoriesExecutive OrdersPermits, Certifications, Verifications, and RegistrationsFormsDatabase ApplicationsResearchA-Z indexVapor Recovery Keywords Airborne ToxicsAir PollutionAir Quality PlansBiking & WalkingBusiness AssistanceCars & TrucksCars, Trucks, & MotorcyclesClean CarsClimate ChangeCommunitiesConsumer ProductsConsumer ProductsDiesel VehiclesEnforcementEnvironmental Justice(-)FuelsHealthHeavy-Duty EquipmentIndoor Air Quality & ExposureIndustry & ManufacturingMeasuring Air QualityOn-Road Heavy-Duty VehiclesResearchSimple Solutions to Improve Air QualitySustainable CommunitiesTruck & BusAlternative Diesel FuelsCalifornia Bioresources Economy SummitCarbon Capture and SequestrationFuels ProgramVapor Recovery(-)Vapor Recovery - OverpressureStudy 1 results found for StudyOverpressure - Studies and Technical Support Documents FeaturedTruckStop Diesel Truck InformationDriveClean Buying guide for clean and efficient vehiclesBreathe Well Air quality in your neighborhood