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The 411 on MPG: How the US regulates fuel economy for cars and trucks. (It's complicated)

View Date：2025-04-16 08:03:41

Trying to explain how the U.S. government regulates motor vehicles is no easy matter: There are scores of standards involving recalls, mandatory testing and equipment, crash reporting and more.

How the federal government regulates fuel economy − how many miles per gallon of gas a manufacturer's new cars and light-duty trucks are expected to get − and how that impacts greenhouse gas emissions that cause climate change is every bit as complicated, if not more so.

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