This past summer, a spinach e-coli scare was front page news for days. But before the recent front-page Washington Post article, most readers probably never dreamed that more than 2 billion gallons of raw sewage pour into the Anacostia River every year.

Nation-wide, the figure is a mind-boggling 860 billion gallons of raw or partially-treated sewage that flow straight into our rivers and streams.

Yangtze River DolphinWho doesn't love dolphins? The Chinese have long revered the legendary "baiji" dolphin, a six feet long, tiny-eyed, long-nosed "gray phantom" that for eons has made its home in the waters of the Yangtze River. But not for much longer. With only 50 left along the river's 1,500-mile reach, scientists have declared the dolphin "functionally extinct." The primary culprit?