The new targets affect three categories of vehicles and apply to model years 2014 to 2018:
• Big rigs or semis will have to slash fuel consumption and production of heat-trapping gases by up to 23 percent.
• Gasoline-powered heavy-duty pickups and vans will have to cut fuel consumption and gas emissions by 10 percent, or by 15 percent if the vehicles run on diesel fuel.
• Work trucks, which include everything from fire trucks and concrete mixers to garbage trucks and buses, will have to reduce fuel consumption and gas emissions by 9 percent.
Cars, light trucks: Last month, President Obama announced a deal with automakers to double overall fuel economy for cars and light trucks, now 27 miles per gallon, to 54.5 miles per gallon by 2025, starting in model year 2017.
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