Supplies of ultra-clean diesel fuel should be readily available at pumps when rules take effect on Sunday, U.S. officials said Tuesday. That will mean less pollution, fewer health issues and possibly the start of a renaissance for diesel cars.

“Cleaner diesel fuel will immediately cut soot emissions from any diesel vehicle by 10 percent,” the environmental group Natural Resources Defense Council and the industry group Diesel Technology Forum noted in a joint statement. “But when combined with a new generation of engines hitting the road in January, it will enable emission reductions of up to 95 percent.”

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