All About: Cities and energy consumption Posted byadmin September 19, 2009 Humans can now officially be called an urban species. More than half of the global population now live in cities and the United Nations says that by 2030, 60 percent of us will live in them. Related posts: Big cities prove apt for apps Obama says U.S. must get in front on green energy Energy-gobbling city home to biggest solar roof German Cities Suffer in the U.S. Financial Crisis Cities Once Immune Now Suffering in Recession