The U.S. Environmental Protection Agency (EPA) and National Highway Traffic Safety Administration (NHTSA) are working to finalize rules for light-duty vehicles that could significantly reduce U.S. greenhouse gas emissions.
These rules, which could be released this week, will establish new fuel economy and greenhouse gas standards for passenger cars and light trucks for model years 2017 through 2025. Light-duty vehicles represent a significant portion of U.S. greenhouse gases, accounting for approximately 17 percent of U.S. emissions. If the forthcoming rules resemble the proposed standards published by EPA and NHTSA last November, they will be an important step forward in protecting the environment and shielding consumers from higher gas prices.
Highlights from the Proposed Rules
The proposed rules would establish an emissions standard of 144 grams of carbon dioxide (CO2) per mile for passenger cars and 203 grams of CO2 per mile for trucks. If vehicles meet the standards entirely through fuel economy improvements, cars will achieve 61 miles per gallon (mpg), while trucks will achieve 43 mpg [^1]. If cars and trucks attain these standards, vehicles sold in 2025 will consume roughly half the fuel as vehicles sold in 2008 (27 mpg), emitting about half the greenhouse gases.