"Scientists say the Mackenzie River and its tributaries play a crucial role in cooling a warming climate, acting as a 'climate stabilizer.'"

"The facilities will restore pumping of drinking water from scores of contaminated San Fernando Valley wells, lessening L.A.'s reliance on imported water, agency says."

"A large concrete water main that exploded this spring along busy Connecticut Avenue in Chevy Chase has brought to light a little known local distinction: The Maryland suburbs have more of a notoriously problematic stock of pipe than almost any major U.S. water utility."

"Downtown Calgary could look like a bit of a ghost town today, with entire neighbourhoods shut down and office workers told to stay home due to massive flooding."

"A federal environmental regulator will not finish and review a draft report tentatively linking hydraulic fracturing to Wyoming groundwater contamination and will instead allow state agencies to further investigate the issue."

"The brutally efficient coal-extraction method known as 'longwall mining' has permanently damaged a half dozen streams in Pennsylvania, state regulators have found — a finding that could trigger deeper waves for such operations in the state."

"NEW ORLEANS -- Scientists in Michigan and Louisiana are predicting a big summer 'dead zone' in the Gulf of Mexico unless a tropical storm hits the area shortly before or during the annual measurement. In the Chesapeake Bay, scientists expect a smaller-than-average area where there's too little oxygen to support fish, shellfish and other aquatic life."

A mysterious ailment is causing algal blooms and killing dolphins, manatees, and pelicans along the Indian River Lagoon, one of the most valuable and diverse ecosystems in North America.

"The latest domestic energy boom is sweeping through some of the nation's driest pockets, drawing millions of gallons of water to unlock oil and gas reserves from beneath the Earth's surface."

"Fishing vessels that deploy gill nets snare and drown at least 400,000 seabirds every year, and the actual figure could be considerably higher, according to research published in the June edition of an academic journal devoted to conservation."

"The Supreme Court ruled today that Texas has no right to Oklahoma's water under a 1980 interstate compact in a case seen as having broad implications in the arid western United States."

"The government of Nicaragua is fast-tracking a bill that would authorize a company from China to build a new canal connecting the Atlantic and Pacific Oceans. The dream of a Nicaraguan canal dates back more than a century."

"The Bracken Bat Cave, just north of San Antonio, is as rural as it gets. You have to drive down a long, 2-mile rocky road to reach it. There's nothing nearby — no lights, no running water. The only thing you hear are the katydids."

"Aboard the Dorothy Ann, in Lake Erie near Fairport Harbor, Ohio — As Capt. Jeremy R. Mock steered this 711-foot combination of tug and barge toward a harbor berth, a screen of red numbers indicated the decreasing depth of water under the vessel: 6 feet, 3.6 feet, 2 feet."

"GRANTS PASS, Ore. -- Tens of thousands of acres in Oregon's drought-stricken Klamath Basin will have to go without irrigation water this summer after the Klamath Tribes and the federal government exercised newly confirmed powers that put the tribes in the driver's seat over water use — a move ranchers fear will be economically disastrous."