Tropical Rainforest (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption The El Yunque National Forest in Puerto Rico is a tropical rainforest where a strain of the microbe Enterobacter lignolyticus was found that can tolerate an ionic liquid used to dissolve cellulosic biomass for microbial-based biofuel production. Credit (Photo by Kristen DeAngelis) 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.