Stephen Bernow was a founding member of the Tellus Institute. His work spanned a wide variety of issues in environment and development with a focus on energy systems and climate change policy. He conducted pioneering research on incorporating environmental externalities into planning and pricing, implementing ecological tax reform, designing sustainable transportation strategies, promoting renewable resources, and modeling climate policy. Before joining Tellus, Dr. Bernow received a PhD in physics from Columbia University in 1970 and taught at the university level.