How an Energy Crisis Pushed the Government Into Creating National Fuel Efficiency Standards
The origins of car fuel economy standards can be traced back to the 1970s.
California Regulators Move to Protect the State's Fuel Efficiency Standards
The new plan would require automakers to comply with the state's more stringent greenhouse gas emissions rules despite proposed rollbacks.
California Could Lose Its Fuel Efficiency Waiver. What Would That Mean for the Country?
Some state legislators seem to agree that California's standards are what's in the United States' best interest.