Källa: www. For the first time in world history, more people live in cities than in rural areas. And that trend is not going away. By 2030, the UN expects that 60 percent of the world’s populationwill live in cities, and big cities will only get bigger. The good news is highly dense areas can be far more efficient settings, requiring fewer resources for more people to live. (Think of the reduced energy needed to move each person on a subway than in a car.) The challenge is to maximize the green potential of all elements of the city and its inhabitants. Läs mer.