Progress in Industrial Ecology published the Ausubel-Wernick-Barrett-Waggoner paper Industrial Ecology for Leverage to Let Loose Less Cadmium . We thank Peter Elias, who helped us start work on cadmium back in the 1990s. The paper exemplifies a kind of analysis we recommended in our 1997 report Industrial Ecology: Some Directions for Research. The growth of industrial ecology as evidenced by the development of the Journal of Industrial Ecology, Progress in Industrial Ecology, and the International Society for Industrial Ecology is gratifying. And, for those worried about cadmium, remember to think zinc.