Managing urban shrinkage by bulldozer

It's not just for the Rust Belt anymore. [Link]

He said: "The obsession with growth is sadly a very American thing. Across the US, there's an assumption that all development is good, that if communities are growing they are successful. If they're shrinking, they're failing."

But some Flint dustcarts are collecting just one rubbish bag a week, roads are decaying, police are very understaffed and there were simply too few people to pay for services, he said.

If the city didn't downsize it will eventually go bankrupt, he added.

Flint's recovery efforts have been helped by a new state law passed a few years ago which allowed local governments to buy up empty properties very cheaply.

They could then knock them down or sell them on to owners who will occupy them. The city wants to specialise in health and education services, both areas which cannot easily be relocated abroad.

The local authority has restored the city's attractive but formerly deserted centre but has pulled down 1,100 abandoned homes in outlying areas.

Mr Kildee estimated another 3,000 needed to be demolished, although the city boundaries will remain the same.

Already, some streets peter out into woods or meadows, no trace remaining of the homes that once stood there.

Choosing which areas to knock down will be delicate but many of them were already obvious, he said.

The city is buying up houses in more affluent areas to offer people in neighbourhoods it wants to demolish. Nobody will be forced to move, said Mr Kildee.

"Much of the land will be given back to nature. People will enjoy living near a forest or meadow," he said.