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In order to accommodate the expected increase in urban population of two billion people by 2030, we would need 200 new cities with populations of 10 million people—think 200 cities larger than Paris! Obviously the sustainable planning and construction of these cities is crucial to avoiding exponential increases in future emissions; however, accommodating two billion additional people will have wider implications than just on the environment. We need to address the livelihoods of the urban migrants themselves.