Corporate Average Fuel Economy Standards / Greenhouse Gas Standards

The Environmental & Energy Law Program is tracking the environmental regulatory rollbacks of the Trump administration. Click here for the list of rules we are following.

Why it Matters

The National Highway Traffic Safety Administration (NHTSA) in the Department of Transportation (DOT) has set fuel efficiency standards for cars and light trucks since 1975. In a separate but related process, the Environmental Protection Agency (EPA) has issued greenhouse gas emission standards since in 2010. Transportation is the one of the largest greenhouse gas sources in the US, contributing more than one-quarter of all emissions.  Improving the fuel economy of cars saves gas money and lowers emissions; a roll-back of standards increases fuel costs and pollution.

Current Status

On August 2, 2018 EPA and NHTSA released new proposed standards for greenhouse gas emissions and fuel economy. The agencies propose maintaining the CAFE and CO2 standards applicable in model year 2020 for model years 2021-2026. The agencies propose withdrawing the permission granted to California to set its own greenhouse gas emissions standards, which a dozen other states also use. The rules will be open for comment for 60 days once published in the Federal Register and people can comment on a wide range of alternatives, including different stringencies and retaining existing CO2 standards and CAFE standards.

Click here learn more about the history of this rule and actions that have been taken on it by the Trump Administration.

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