The phrase Industrial Ecology evokes powerful images and strongreactions, both positive and negative. My reaction is positive; thephrase fills my mind with images of industrial systems that mimic themass conservation properties of natural ecosystems. I am also struckby the powerful analogies that astute observers of the field madebetween the evolution of natural ecosystems and the potentialevolution of industrial systems. billions of years ago, the Earth'slife forms consumed the planet's stocks of materials and changed thecomposition of the atmosphere.
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