Amory Lovins, chairman and chief scientist of the Rocky Mountain Institute, a U.S. think tank headquartered in Colorado, has been researching and publicly spotlighting energy-efficiency and renewable-energy issues for more than four decades. He has been a professor at nine universities; authored more than 30 books; advised a long list of heads of state, governments and major corporations; and won numerous awards, including a MacArthur genius award. Time Magazine has named him one of the 100 most influential people in the world. His latest book, “Reinventing Fire: Bold Business Solutions for the New Energy Era,” outlines an ambitious agenda that calls for the United States by 2050 to eliminate its use of oil, coal and nuclear energy and to cut its use of natural gas by a third. Lovins spoke with EcoAméricas correspondent James Langman on a recent visit to Chile, where he gave speeches in Santiago and Coyhaique.