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Cities and Climate Change /  Joan Clos, Executive Director of UN-Habitat, Climate change policy &#38; practice, IISD, 3/10/2011http://climate-l.iisd.org/guest-articles/cities-and-climate-change/The urban dimension of climate changeThe effects of urbanization and climate change are converging in dangerous ways. The global population, today more than 50% urban, faces unprecedented negative impacts in terms of quality of life and social stability...&#160;