AP:

Vermont has become the first of several Northeastern states that are expected to adopt new rules that seek to cut emissions of greenhouse gasses from cars by improving their gas mileage.

New York, Massachusetts, Maine, Connecticut and Rhode Island also have been moving to adopt the new carbon-reduction rules so that they can keep pace with California. The federal clean air act allows for two sets of rules governing emissions from cars sold in the United States: the California standard and the less-strict federal standard.

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