Hours after being sworn in as the new U.S. Secretary of Transportation, Sean Duffy took aim at the main way the federal ...

Volatile gasoline prices have spiked over $4 a gallon sparking consumer interest in vehicles that consume less petroleum and save at the pump. Concern about air pollution, carbon-dioxide emissions ...

"American consumers are calling for cleaner cars that won't pollute their air or ... warming pollution standard of 163 grams per mile by 2025, the equivalent of 54.5 miles per gallon (mpg) if ...