WASHINGTON — A new study released by the U.S. Department of Agriculture finds greenhouse gas emissions from corn-based ethanol are about 39% lower than gasoline.
The study also states that when ethanol is refined at natural gas-powered refineries, the greenhouse gas emissions are even lower, around 43% below gasoline.
“These new findings provide further evidence that biofuels from America’s heartland reduce greenhouse gases even more than we thought, and that our farmers and ethanol plants continue to become more efficient and effective,” said USDA Secretary Sonny Perdue.
“President Trump has made it abundantly clear he is unleashing the full potential of American energy production as we retake our rightful place as the world’s leader.
“Expanding the sale of E15 year-round will provide consumers with more choices when they fill up at the pump, including environmentally friendly fuel with decreased emissions. I appreciate EPA Administrator Andrew Wheeler moving expeditiously to finalize the E-15 rule before the start of summer driving season.”
“This new USDA study further supports that ethanol is a win-win for all Americans,” said Emily Skor, Growth Energy CEO.
“Higher ethanol blends provide not only tremendous health and environmental benefits, but economic benefits as well for rural America and our farmers. Our industry remains committed to cleaner fuel options for all drivers, and ethanol’s role in reducing GHGs is among the reasons why. We look forward to drivers experiencing these benefits and more when they soon have access to E15 year-round.”
The study, led by Dr. Jan Lewandrowski of USDA’s Office of the Chief Economist, and published in the journal Biofuels, supports findings of other research that ethanol has a significantly better greenhouse gas profile than previously estimated.
The study, titled “The greenhouse gas benefits of corn ethanol — assessing recent evidence,” attributes much of these additional benefits to revised estimates of the impacts of land-use change as a result of demand for ethanol.
Where previous estimates anticipated farmers bringing additional land into production as a result of increased corn prices, recent analysis finds only modest increases in crop acreage.
Additional improvements at ethanol refineries, combined with on-farm conservation practices that reduce greenhouse gas emissions, such as reduced tillage and cover crops, have further decreased emissions associated with corn ethanol.