Posted by William Goldner, Acting Director for the Division of Sustainable Bioenergy, National Institute of Food and Agriculture , on May 26, 2015 at 12:00 PM This post is part of the Science Tuesday feature series on the USDA blog. Check back each week as we showcase stories and news from USDA’s rich science and research portfolio. Trees killed by bark beetles have, for years, been a source of fuel for forest fires. Now, those very trees are being turned into a biofuel and biobased products.