Mark T. Holtzapple, PhD, is a professor in the Artie McFerrin Dept. of Chemical Engineering at Texas A&M Univ. (College Station, TX; Phone: 979-845-9708; Email: m-holtzapple@tamu.edu;). He received his chemical engineering degrees from Cornell Univ. (BS, 1978) and the Univ. of Pennsylvania (PhD, 1981). After his formal education, he served as a captain in the U.S. Army, working at the Natick R&D Center to develop a miniature air conditioner for soldiers wearing chemical protective clothing. He joined the faculty of Texas A&M Univ. in 1986. His research focuses on sustainability, including the conversion of waste biomass to fuels, chemicals, and animal feed; high-efficiency engines and air conditioners; conversion of waste heat to electricity; high-torque electric motors; carbon capture; and water desalination. He has received many awards for teaching and research, including the Presidential Green Chemistry Challenge Award from the president and vice president of the U.S.