Has California’s Low-Carbon Fuel Standard Actually Increased Carbon Emissions?

Fight disinformation. Get a daily recap of the facts that matter. Sign up for the free Mother Jones newsletter.


Last year California passed a much-heralded law requiring oil companies to cut the carbon intensity of their fuel 10 percent by 2020. The state is allowing ethanol to be used as one low-carbon substitute, and recently raised the cap on ethanol in gasoline from six to ten percent. You’ve probably read about the ways the ethanol craze contributes to higher food prices around the world, but what nobody has calculated, until now, is how this affects ethanol’s true carbon footprint. In an analysis released January 17th, two UC Berkeley researchers found that ethanol actually produces more carbon emissions than gasoline. As a result, the carbon intensity of California fuel has ironically risen, between 3 and 33 percent.

 

The researchers, professors Michael O’Hare and and Alexander Farrell, take issue with the model state regulators used to calculate ethanol’s carbon output, arguing that it did not factor in the indirect effects on the global food supply. Among other things, higher corn prices cause farmers half-way around the world to convert more forests into farmland, and those trees are then burned or decay, releasing more carbon into the atmosphere. The professors pointed this out in a letter sent earlier this month to the California Air Board, which is discussing changing its carbon model in light of the findings.

HERE ARE THE FACTS:

Our fall fundraising drive is off to a rough start, and we very much need to raise $250,000 in the next couple of weeks. If you value the journalism you get from Mother Jones, please help us do it with a donation today.

As we wrote over the summer, traffic has been down at Mother Jones and a lot of sites with many people thinking news is less important now that Donald Trump is no longer president. But if you're reading this, you're not one of those people, and we're hoping we can rally support from folks like you who really get why our reporting matters right now. And that's how it's always worked: For 45 years now, a relatively small group of readers (compared to everyone we reach) who pitch in from time to time has allowed Mother Jones to do the type of journalism the moment demands and keep it free for everyone else.

Please pitch in with a donation during our fall fundraising drive if you can. We can't afford to come up short, and there's still a long way to go by November 5.

payment methods

ONE MORE QUICK THING:

Our fall fundraising drive is off to a rough start, and we very much need to raise $250,000 in the next couple of weeks. If you value the journalism you get from Mother Jones, please help us do it with a donation today.

As we wrote over the summer, traffic has been down at Mother Jones and a lot of sites with many people thinking news is less important now that Donald Trump is no longer president. But if you're reading this, you're not one of those people, and we're hoping we can rally support from folks like you who really get why our reporting matters right now. And that's how it's always worked: For 45 years now, a relatively small group of readers (compared to everyone we reach) who pitch in from time to time has allowed Mother Jones to do the type of journalism the moment demands and keep it free for everyone else.

Please pitch in with a donation during our fall fundraising drive if you can. We can't afford to come up short, and there's still a long way to go by November 5.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate