Stateline: Environmental commissioners from several Northeast and Mid-Atlantic states say that a federal plan to cut tailpipe emissions would improve public health, particularly in cities plagued by traffic congestion.

In a letter sent last week, the state commissioners asked Lisa Jackson, the U.S. Environmental Protection Agency Administrator, to quickly propose and finalize so-called “Tier 3” emissions standards, a blueprint for cleaner burning cars and light-duty trucks, along with new rules for low-sulfur gasoline.

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