Higher Gas Prices Alone Won’t Make Cleaner Cars a Reality

The average carbon emissions of U.S. vehicles. (Image: EPA)

It's a storyline that the media and the auto industry have embraced: Higher gas prices are the magic ingredient that U.S. carmakers need in order to sell more fuel-efficient vehicles to consumers. 

The narrative is tempting, especially for those who believe federal gas taxes need to rise in order to fairly price the environmental impact of driving. But if it were true, the record rise in U.S. fuel prices that began in 2007 and lasted through 2008 might be expected to spur a notable increase in production of cleaner cars.

And that didn't happen, as the Environmental Protection Agency (EPA) reported today in a new analysis [PDF] of carbon emissions and fuel economy trends in the U.S. auto fleet. The average fuel-efficiency of American cars went from 20.6 miles per gallon (mpg) in 2007 to 21.0 mpg in 2008, according to the EPA, and is poised to rise by just 0.1 for the 2009 model year.

In real pollution terms, that means the average American car will emit just 2 grams fewer CO2 per mile this year than it did in 2008. For Dan Becker, a longtime environmental advocate who directs the Safe Climate Campaign, that paltry progress is an argument for stronger, consistent increases in the nation's fuel-efficiency and emissions standards. Becker said in a statement:

Sadly, the administration's plan to raise fuel-efficiency standards to 35.5 mpg by 2016 contains enough accounting loopholes to make Enron proud.