Contaminated brownfields: how did it come to this in America?

The business is long gone, the buildings removed but the aftermath is not.  Left behind is a “brownfield,” a nice word for a site contaminated with deadly poisons, and no one left to pay for clean-up if that’s even possible. And what to do with it once it is cleaned up? Another industrial site, another fence line community in the poorer part of town where the people of color live. There are thousands of brownfields all over America. How did it come to this? No one intended to damage the Earth and make humans sick. We blundered into it.