Jet Biofuels (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Air travels accounts for about 2 percent of the annual greenhouse gas emissions from human activity. A new catalytic process for biofuels could significantly reduce this figure. Credit Courtesy of the Boeing Company Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.