"TEXAS CITY, Texas -- The cleanup of an unknown amount of thick, sticky oil that spilled into the Galveston Bay blocked the movement Sunday of about 60 ships, including three cruise ships, between the Gulf of Mexico and one of the world's busiest petrochemical transportation waterways."

"America’s largest industrial accident tore apart the town of Kingston, Tennessee. Five years later, has the industry learned anything?"

"CDC review of seven studies involving over 8,000 children suggests a link between childhood leukemia and exposure to high levels of auto exhaust. Direct cause-effect needs more study, researchers say."

"Dark clouds of soot and gases spewed by tractors, bulldozers and backhoes are becoming a thing of the past under new federal standards that have forced cleaner diesel engines this year."

"A major oil pipeline owned by Sunoco Logistics Partners LP leaked thousands of gallons of crude oil into a nature preserve in southwest Ohio late on Monday."

"DANVILLE, Va. — Gov. Terry McAuliffe said Tuesday he expects Duke Energy to fully compensate Virginia for a massive coal ash spill into the Dan River that turned collection basins at Danville's water treatment plant gray."

"When rancher Clint McRae first saw the swirling green and white ponds of arsenic, boron, mercury and lead-containing sludge 10 miles from his property, it was in a photography show at the Montana statehouse. He first thought they were abstract art, but quickly realized some were aerial photos of the ash slurry left over from burning coal at southeastern Montana’s Colstrip Steam Electric Station."

"Below some of the world’s most expensive real estate, in the heart of Silicon Valley, pipes and pumps suck thousands of gallons of contaminated water every hour from vast underground toxic pools."

"The city of St. Louis has been working to reduce lead poisoning since the health department introduced a lead program in the 1940s. Since that time great strides have been made. But the danger of exposure to lead still exists in the city, and screenings reveal more than a thousand cases of elevated blood lead levels each year."

"Paris enjoyed a rare reprieve from traffic jams Monday as a draconian clampdown on cars, aimed at banishing stubborn levels of smog, took effect."