Some older American cities are sick and dying. Often strategically located along waterways and important transportation infrastructure, they evolved over centuries to support U.S. heavy industry, which largely has disappeared. Also disappearing with those businesses were jobs, opportunities and people. But they left behind the wreckage of residential, commercial and industrial structures that no longer have a purpose. Cities like Cleveland, Detroit, Baltimore and Camden are struggling to reinvent themselves and start anew, but they are burdened with thousands of abandoned or deteriorated structures that breed crime, drugs and violence and form a barrier to progress. The opportunity for such
The 2016 Summer Olympics boating and swimming events have put an international spotlight on what has been a long-running problem in Rio de Janeiro—untreated sewage and trash are clogging up major bays and waterways.