"Christopher Clark, who directs the bioacoustics research program at Cornell University, is among the world's best scientific listeners. His work has revealed how human-made noise is filling the ocean, making it harder for marine animals to hear their own world. But Clark didn't start out with much interest in whales at all."

"The issue of abandoned mines and their legacy of water pollution is not unique to Colorado. Abandoned mines across Ohio have polluted streams and creeks for decades, turning waterways orange and lacing them with sulfuric acid, dissolved metals and toxic sediments."

"Los Angeles has been blackballed. The city has completed a program of covering open-air reservoirs with floating "shade balls" to protect water quality."

"Last September, the remote community of Point Lay on Alaska’s North Slope became the focus of headline news when a staggering 35,000 walruses crowded onto the shore nearby. And now, some scientists are saying a similar event could happen this summer — in fact, any time now."

"While crews begin the arduous task of cleaning up Colorado’s Animas River — where contamination by heavy metals and toxins leaked from an abandoned hard rock mine turning the water orange — thousands of other natural sites across the American West remain at risk from similarly hazardous defunct quarries."

"RIO DE JANEIRO - Thirteen rowers on the 40-member U.S. team came down with stomach illness at the World Junior Rowing Championships - a trial run for next summer's Olympics - and the team doctor said she suspected it was due to pollution in the lake where the competition took place."

"Environmental Protection Agency Administrator Gina McCarthy apologized Tuesday for a mine spill in Colorado that her agency caused last week and planned to travel to the area Wednesday, amid increasing criticism from lawmakers about the EPA’s response."

"When people urge the removal of dams they say are strangling rivers in the West, it’s usually fish they’re worried about. Studies of dam-removal projects show that migratory species like salmon respond quickly to improved conditions once a dam is removed. But the removal of a dam on the Elwha River in northern Washington State — the largest such project in the United States — is demonstrating that there can be another beneficiary: the beach."

"Keena Kimmel's bookshop occupies a cozy curve along the Animas River, a place of wild sunflowers and lilacs where fisherman try their luck and kayakers glide under iron bridges. But this weekend the river was empty and Kimmel's heart broken."