Environment News Service: The U.S. Environmental Protection Agency today finalized a rule intended to reduce air pollution from passenger cars and trucks by lowering the allowable sulfur content of gasoline and setting new vehicle emissions standards.
Known as Tier 3, the rule will take effect on January 1, 2017. It continues the transition that began with EPA's Tier 2 program, finalized in 2000, in which EPA treated vehicles and fuels as a system to reduceboth gasoline sulfur and vehicle emissions.
The Tier 3 vehicle...