"The analysis of federal pipeline safety data comes as politicians from both parties raise questions about Line 5 and a tribe has voted not to renew its easement."

"Contamination from former or current military installations has ignited a nationwide review of water on or around bases that used a firefighting foam containing toxic chemicals."

"A technology competition seeks solutions to Lake Erie's biggest problems, including harmful algae blooms and aging water systems. Teams in cities around the region are competing for thousands of dollars in prize money and consulting services to create apps and other tools."

"ALAMEDA COUNTY, Calif. — If you think the era of big dam building is over in America, check out the Calaveras project."

"As the White House pushes Congress to fund President Trump's U.S.-Mexico border wall, a new wrinkle has emerged that could stymie parts of the massive project. Mexican engineers believe construction of the border barrier may violate a 47-year-old treaty governing the shared waters of the Rio Grande. If Mexico protests, the fate of the wall could end up in an international court."

"Global sea level rise could happen at nearly twice the rate previously projected by the U.N. Intergovernmental Panel on Climate Change, even under the best scenario, according to a new report."

"Official reports released Monday say the catastrophic damage to Oroville Dam’s main spillway probably stemmed from swift water flows under the concrete chute, which was cracked and of uneven thickness."

"The U.S. Air Force says it won't provide safe drinking water to Oscoda residents affected by chemical pollution from the former Wurtsmith Air Force Base because a Michigan law seeking that is discriminatory."