The most obvious gas vapor recovery system for drivers is the rubber boot at the end of the fuel pump nozzle that fits directly over the gas tank opening. When drivers refuel, gas vapors can escape and contribute to smog and harmful air pollution. To combat the release of these vapors, most gas stations have installed special gas pump nozzles that include the rubber boot to block vapors from escaping.
The EPA says the rubber fittings will be phased out as part of the new rule. The White House decision is the latest government-wide review of federal regulations. (CNN, 5/10/2012)