Amory Bloch Lovins was trained in physics and has worked professionally as an environmentalist. He is Chairman/Chief Scientist of the Rocky Mountain Institute. He previously served on the National Petroleum Council, an oil industry lobbying group, from 2011–2018. Lovins’ is a MacArthur Fellowship recipient (1994), and author and co-author of books which make arguments for and popularize energy-efficiency principles to public and corporate audiences. Lovins' works include Factor Four with Hunter Lovins and Ernst Ulrich von Weizsäcker, and Natural Capitalism with Hunter Lovins and Paul Hawken. In the 1990s, his work with the Rocky Mountain Institute has included the design of an ultra-efficient automobile, the "Hypercar".