Dozens of US cities may have entire neighbourhoods bulldozed as part of drastic "shrink to survive" proposals being considered by the Obama administration to tackle economic decline. The government looking at expanding a pioneering scheme in Flint, one of the poorest US cities, which involves razing entire districts and returning the land to nature. Local politicians believe the city must contract by as much as 40 per cent, concentrating the dwindling population and local services into a more viable area. The radical experiment is the brainchild of Dan Kildee, treasurer of Genesee County, which includes Flint. Having outlined his strategy...