Spero 1 (IMAGE) DOE/Idaho National Laboratory Caption Spero researchers Dr. Ian Klein (left) and Dr. Shou Zhao (right) display bio-based composite prototypes made using biomass pre-processed at INL. (Photo courtesy of Spero Renewables) Credit Spero Renewables Usage Restrictions N/A License Original 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.