From space, cities can look like microscopic living organisms, with bright nodes of industrial and civic activity connected by circulating routes of traffic and transport. Some cities are taking this analogy to a new level with an “urban metabolic” approach ...

By 2050, the global population is expected to soar beyond 9 billion people, 66 percent of whom may live in cities. Accompanying this stunning pace of urbanization will be a complex web of challenges related to consumption, pollution and water and energy stresses. Recently, ...