Collaborative City

Worldwide 55 percent of all people live in cities. They cover 4 percent of the landsurface, use 67 percent of all energy that is produced and are responsible for 70 percent of the emission of greenhouse gasses. Cities are not only the most important economic centres of the world, their political power is also increasing. Observers believe that growing sustainability will result in the first place from policies issues by the world’s largest cities instead of national governments. In some countries a relief, indeed. In order to express their intentions, many cities showcase themselves with adjectives such as ‘smart’, resilient’, sustainable’, ‘sharing’ and the like. These predicates refer to results that already have been accomplished, however small, but they express their mission for the...