1. Annual Volatile Organic Compounds (VOC) Emissions from Road Vehicles in the United States from 1970 to 2020https://www.statista.com/statistics/1234976/road-transportation-volatile-organic-compounds-emissions-us/
2. Automotive Evaporative Emissions Systemshttp://tiij.org/issues/issues/5_1/5_1e/5_1e.html
3. Onboard Refueling Vapor Recoveryhttps://en.wikipedia.org/wiki/Onboard_refueling_vapor_recovery