"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."

"NEW ORLEANS — Ten years ago, the neighborhood hard by the 17th Street canal in this city was water-blasted. The surges from Hurricane Katrina swept into the canal, broke through its flood walls and forced homes off their foundations. Much of New Orleans remained steeped in brackish filth for weeks until the sodden city could be drained."

"Three days after EPA workers triggered a huge blowout at a festering mine in southwestern Colorado, a mustard-colored plume — still fed by 548 gallons leaking per minute — stretched more than 100 miles, spreading contaminants including cadmium, arsenic, copper, lead and zinc."

"Humpback whales don't just sing songs — they compose with the whales around them, singing a song that evolves over time. Scientists didn't know that until they started recording whale sounds in the 1960s and spent years listening."

"DENVER — A million-gallon mine waste spill that sent a plume of orange-ish muck down a river in southwest Colorado on Thursday was caused by a federal mine cleanup crew."

"An environmental group petitioned the federal government on Thursday to immediately inspect more than 200 miles (320 km) of undersea oil pipelines off California's coast."

"In August 2014, chemicals from a Grupo México mine contaminated a main waterway. A Mexicoleaks Alliance investigation reveals that the spill control equipment at the Buenavista Copper Mine was not in compliance with regulations that federal authorities had failed to enforce since 2011. Now residents of seven Sonora municipalities are filing suit."

As August warms waters seasonally in many parts of the U.S., harmful algal blooms are causing health hazards. A prime example is Toledo, where high levels of an algal toxin made city drinking water unusable last year. Algal blooms in the warm, shallow Lake Erie are worsened by agricultural runoff. With climate warming, new algal blooms are showing up in new places, like the Pacific Ocean.