"Drought and demand are pushing the Colorado River beyond its limits — with the needs of more than 40 million people in seven Western states projected to outstrip dwindling supply over the next 50 years, according to an advocacy group's report on endangered rivers released on Wednesday."

"The Obama administration on Monday renewed an interagency agreement that backs the development of biofuels for the aviation industry and reiterated its support for embattled federal renewable fuel targets."

"Supreme Court justices [Tuesday] appeared receptive to the trucking industry's call to strike down a Port of Los Angeles program designed to clean up some of the country's most diesel-polluted air."

"Many Americans assume that the chemicals in their shampoos, detergents and other consumer products have been thoroughly tested and proved to be safe. This assumption is wrong."

"After a generation of effort, New England's waters are clean enough to support an oyster industry. But climate change could undermine those gains."

The 2013 Pulitzer Prize for National Reporting went to InsideClimate News, a 5-year-old web-only nonprofit, for its book-length feature series on the 2010 Enbridge tar-sands oil spill that fouled miles of Michigan's Kalamazoo River. InsideClimate has been one of the most aggressive media outlets covering the current spill in Mayflower, Arkansas. ExxonMobil recently threatened one of InsideClimate's reporters with arrest for trying to find a federal government press office handling the spill.

"Synthetic chemicals added to consumer products to meet federal and state flammability standards are showing up in waterways, wildlife and even human breast milk."

"The fire that destroyed part of Chevron's Richmond refinery happened because weak state regulations allowed the company to monitor rather than simply fix potential problems, federal investigators said Monday."

"CUCAPÁ EL MAYOR, Mexico — Germán Muñoz looked out at the river before him and talked about the days when dolphins swam here, 60 miles from the sea."

"SPRINGFIELD, Ohio -- The U.S. Environmental Protection Agency will conduct tests at a Tremont City site containing buried barrels filled with 1.5 million gallons of hazardous waste."

"Nearly 140,000 whales and dolphins could be injured if the Obama administration allows energy companies to conduct seismic research aimed at identifying oil and gas along the Atlantic Coast, according to a new report issued Tuesday."

"High benzene levels in groundwater have been detected about 1,400 feet downstream of the presumed source of a hydrocarbons leak northwest of Parachute, the state Department of Natural Resources said today."

"WASHINGTON -- The Obama administration’s nominee to lead the Environmental Protection Agency declined on Thursday to answer questions about a controversial new guide that suggests public health standards could be relaxed dramatically in the event of a nuclear attack or accident."

"You might have been wondering whether the Obama administration was going to impose the first-ever greenhouse gas limits on new power plants, since the deadline is April 13."

While honey bee die-offs often called "colony collapse disorder" have been increasing for several years, so has scientific evidence that a widely used class of pesticides called neonicotinoids could well be an important contributing cause. In 2011, EPA said it would review its approval on one such pesticide. Now it says it expects to finish in five years.