n69.
Factor 10 Club, “Carnoules Declaration”, 1994, available at http://tinyurl.com/4nxeuq . Factor 10 is an evolution of “Factor Four”—the theory that, with improvements in eco-efficiency and patterns of living, we could halve our consumption of resources and double our wealth: a quadrupling of resource productivity. The name “Factor Four” has become generic, even though more ambitious efficiency improvements (e.g., Factor Ten, Factor Fifty . . .) are being studied. It is especially significant in its insight about the scope for improvements in energy-efficiency. See Ernst Weizsäcker, Amory B. Lovins and L. Hunter Lovins (1997), Factor Four: Doubling Wealth, Halving Resource Use, p xv and passim. For further reading, see Paul Hawken, Amory B. Lovins and L. Hunter Lovins (1999), Natural Capitalism; or Amory B. Lovins, E. Kyle Datta, Odd-Even Bustnes, et al. (2005), Winning the Oil Endgame: Innovation for Profits, Jobs and Security.