The Environmental Protection Agency (EPA) said it will move forward with its Tier 3 rule that will limit the amount of sulfur in U.S. gasoline by two-thirds and impose fleetwide pollution limits on new vehicles by 2017. EPA aims to reduce the allowable sulfur content in gasoline from 30 parts per million to 10 ppm.
The new proposed rule had been stuck in regulatory limbo since December 2011 because of industry and political opposition.
Representatives of the American Petroleum Institute (API) and the National Petrochemical and Refiners Association testified before Congress in 2011 that the technology used to reduce the sulfur content of gasoline results in increased energy consumption and more greenhouse gas emissions during production. Removing sulfur from gasoline also can increase emissions of other pollutants, they said.
API said a more stringent sulfur limit would increase gasoline production costs by 9 cents per gallon. Gasoline production also could decrease by 7 percent to 14 percent as a result of the rule.
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