Dr. Robert L. Hirsch is a physicist and principal author of the landmark study “The Peaking of World Oil Production” conducted for the U.S. Department of Energy. Dr. Hirsch has served in a wide variety of roles as a consultant and adviser to government and industry. Much of his recent work has focused on problems associated with the peaking of world conventional oil production and its mitigation. He is past chair of the Board on Energy and Environmental Systems of the National Research Council, the operating arm of the National Academies, and has served on a number of National Research Council committees.