From yesterday’s Wall Street Journal, “How To Build A Greener City” by Michael Totty:
Urban populations around the world are expected to soar in the next 20 years, to five billion from more than three billion today. If the current rate of urbanization holds steady, cities will account for nearly three-quarters of the world’s energy demand by 2030 [...] So, cities aren’t going to have be made a little greener; they’re going to have to be rethought.