The Limits to Growth (1972) – projected the world would run out of gold by 1981, mercury and silver by 1985, tin by 1987, zinc by 1990, petroleum by 1992, and copper, lead and natural gas by 1993. It also stated that the world had only 33-49 years of aluminum resources left, which means we should run out sometime between 2005-2021. (See Donella Meadows et al., The Limits to Growth: A Report for the Club of Rome’s Project on the Predicament of Mankind. New York: New American Library, 1972.)