"A symbol of America’s ailing infrastructure, Lock No. 52 on the Ohio River is responsible for a shipping bottleneck that hobbles commerce far and wide."

"Negotiators from both nations are hustling to finish a new agreement for sharing water from the Colorado River — before President Barack Obama leaves office."

"Canada this month took steps toward joining the United States in banning the sale of personal-hygiene products that contain tiny plastics known as microbeads in an effort to keep them away from fish and wildlife and address plastic pollution in general."

"North Dakota's governor ordered the expulsion of thousands of Native American and environmental activists camped on federal property near an oil pipeline project they are trying to halt, citing hazards posed by harsh weather as a blizzard bore down on the area."

"Recent discoveries of illegal, unreported oil discharges and systematic dumping of chemicals from rigs and platforms have raised new fears about environmental damage in the Gulf of Mexico, more than six years after the worst oil spill in U.S. history."

"Year after year, volunteers return to tributaries of the Klamath River, just like the fish they’re trying to help do the same thing."

"The Arctic Ocean may seem remote and forbidding, but to birds, whales and other animals, it’s a top-notch dining destination."

"More than a year ago, Fresno County farmer Wayne Western Jr. penned a letter to Republican presidential candidate Donald Trump, pleading for help."