The gas cap exchange program is a strategy to reduce summertime air pollution levels by reducing evaporative emissions.
Evaporative emissions play an important role in ozone formation.
Ozone is a particularly dangerous pollutant that adversely impacts our health. The Denver metropolitan area also is on the verge of violating the federal health-based standard for ozone. A violation could result in additional, costly regulations. A. Your gas cap is an important element of the emissions system on your car. A properly functioning gas cap prevents harmful pollutants from escaping into the atmosphere.