Vehicles emit hydrocarbons through the engine and refueling system, even when they are not in operation. ... These emissions are kept in check by the federal governmenta#39;s Corporate Average Fuel Economy (CAFE) standards, which dictate that each automakera#39;s fleet ... However, the biggest, most polluting SUVs and light trucks will not be required to meet car standards until 2007 in California and 2009 nationwide. ... 13 Since Honda certified the Odyssey as a truck in Pollution Lineup.