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Many anglers who pull fish out of the Anacostia River near Washington, DC, eat them despire health warnings.

"As one of the Marx brothers famously said: who do you believe, me or your own eyes?  Climate sceptics, it turns out, are much more likely to believe direct evidence of a changing climate in the form of extreme weather events than they do scientists, when it comes to global warming."

"Florida's rivers are in trouble. That's what the Orlando Sentinel found after a yearlong evaluation of some of the state's biggest and smallest, most urban and remote, cleanest and dirtiest, protected and abused rivers."

"The Mississippi as seen from Ed Drager's tug boat is a river in retreat: a giant beached barge is stranded where the water dropped, with sand bars springing into view. The floating barge office where the tugboat captain reports for duty is tilted like a funhouse. One side now rests on the exposed shore. 'I've never seen the river this low,' Drager said. 'It's weird.'"

"The Environmental Protection Agency announced a new standard for soot pollution on Friday that will force industry, utilities and local governments to find ways to reduce emissions of particles that are linked to thousands of cases of disease and death each year."