"Supreme Court justices on Tuesday wrestled with the sensitive issue of whether a thirsty Texas water district has the right to access water across the Oklahoma state line."

"RONAN, Mont. -- In a place where the lives and histories of Indian tribes and white settlers intertwine like mingling mountain streams, a bitter battle has erupted on this land over the rivers running through it."

"Billions of gallons of raw sewage and contaminated stormwater surge every year into the waterways and onto the streets of New England, as a 40-year-old pledge to clean America's lakes, rivers and streams remains unfulfilled."

"TALLAHASSEE -- The state of Florida filed a lawsuit Saturday against the oil company BP and the cement contractor Halliburton over the Deepwater Horizon oil spill, becoming the fourth state to seek damages for the 2010 disaster."

"Record-setting rains in parts of the Midwest have caused hundreds of flight cancellations and flooding, with one northern Illinois hospital evacuating patients due to rising floodwaters."

"A gluttonous predator is power-eating its way through reefs from New York to Venezuela. It's the lionfish."

"Power producers such as Dynegy Corp. and Duke Energy Corp. are bracing for new U.S. rules on the water they discharge, standards that may impose further costs on the embattled coal industry."

"A BP executive testified the captain of the oil rig that exploded and sent millions of barrels of oil pouring into the Gulf of Mexico delayed activating the installation’s safety systems after the blast as a trial over the disaster ended."