Sean Duffy took aim at the main way the federal government regulates miles per gallon for cars and pickup trucks — also a principal way that it regulates air pollution and addresses climate change.

Explore the truth about summer gasoline: why its blends raise prices yet reduce pollution. Uncover trade-offs in fuel and air ...

Things to Know About the Trump Administration Order on Miles Per Gallon ... it regulates air pollution and addresses climate change. Duffy ordered the federal agency in charge of fuel economy ...

Sean Duffy took aim at the main way the federal government regulates miles per gallon for cars and pickup trucks — also a principal way that it regulates air pollution and addresses climate change.