> Jackhammers removing the old are the sound of a city’s metabolism. Neighborhoods that have construction in them are alive; those without it are ill. But go t

> Jackhammers removing the old are the sound of a city’s metabolism. Neighborhoods that have construction in them are alive; those without it are ill. But go to an old European city and you're not going to see much construction. And they're not tearing down old stuff to build new. And yet many of those cities are very vibrant and full of life.