U.S. to require cleaner gasoline

WASHINGTON — The Obama administration is expected to propose new rules Friday that would slash the amount of sulfur in gasoline, one of the most significant steps the administration can take this term toward cutting air pollution, said people with knowledge of the announcement.

The new rules would bring the rest of the country’s sulfur standards in line with California’s gasoline program.

The oil industry and members of Congress from oil states have criticized the standards as onerous with few health benefits in return. Environmentalists have countered that the rules would improve public health considerably.