I believe that the only way to address such global problems and to assure the sustainability of the natural resources base on which we all depend is to reduce consumption. A couple of decades ago the concept of voluntary simplicity was promoted; soon it might change into involuntary simplicity. Global warming and its effects, the decline of fossil fuels and conflict might drive this. It would be interesting to develop a model for consumption to see how various consumptive levels (energy, water, goods and services) would effect human societies. And then an ABM to see how various societies might react. Paul Paryski
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