Revitalizing America's Filthiest Harbor

"Boston Harbor is vastly changed. It is one of the cleanest harbors in America and a model for how to help the nation's troubled urban waterways. The water - once so dirty you could see only a foot down - has become clear enough to see the bottom in some places. Seals and porpoises are routinely seen out among the harbor islands - which are now a national park. Someone even saw a humpback whale earlier this year. "

Thanks to Chris Steins