"The world's oceans are turning acidic at what's likely the fastest pace in 300 million years. Scientists tend to think this is a troubling development. But just how worried should we be, exactly?"

"BOSTON -- The Massachusetts Department of Public Health (DPH) and the Massachusetts Department of Fish and Game, Division of Marine Fisheries (DMF) have closed 40 oyster beds in Plymouth Harbor, Kingston Bay, Duxbury Bay, Bluefish River and Back River in the towns of Plymouth, Kingston, Duxbury and Marshfield."

"Gov. Rick Scott on Wednesday pledged $90 million for a new bridge along historic Tamiami Trail, a project that promises to restore natural water flow to part of the Everglades and ease -- at least eventually -- unnatural Lake Okeechobee releases now fouling two coastal rivers."

"Loons have enjoyed unprecedented population growth over the last 30 years. They outlived DDT and a time when people used to shoot loons for sport."

"In and around Texas’ vast oil and gas fields, the hydraulic fracturing boom is putting a strain on water supplies already reeling under one of the worst droughts in the state’s history."

"A measles-like virus that suppresses the immune system could be the reason an extraordinary number of bottlenose dolphins have died after becoming stranded along the U.S. East Coast, a panel of dolphin experts said on Tuesday."

"The largest wildfire in the United States continued its destructive march through the Sierra Nevada on Tuesday, pushing further into Yosemite National Park and for the first time burning nearly to the edge of Hetch Hetchy Reservoir, the linchpin of the water supply for 2.6 million Bay Area residents from San Francisco to Silicon Valley."

"The 53,000 water utilities in the United States deliver some of the safest drinking water in the world — a public health victory of unrivaled success that began in 1908 with chlorination campaigns in Jersey City and Chicago. Still, millions of individual cases of waterborne diseases occur annually and related hospitalization costs approach $1 billion each year. In 2007 and 2008, the most recent years for which figures are available, the Centers for Disease Control and Prevention recorded 164 waterborne disease outbreaks, almost entirely from protozoan cysts of the parasite Cryptosporidium."

"Across the high plains, many farmers depend on underground stores of water, and they worry about wells going dry. A new scientific study of western Kansas lays out a predicted timeline for those fears to become reality. But it also shows an alternative path for farming in Kansas: The moment of reckoning can be delayed, and the impact softened, if farmers start conserving water now."