"U.S. EPA has issued its first-ever guidance on contamination in drinking water in the wake of a nuclear disaster, 'dirty bomb' or other radiological accident, drawing criticism from public health and environmental groups."

"In California, there is so much solar energy that grid operators have to switch off solar farms. One solution of dealing with the additional power generated is to share the renewable wealth across state borders – but in the West, it's sparking some not-so-neighborly opposition."

"Regulators are wrangling with bankrupt coal companies to set aside enough money to clean up Appalachia’s polluted rivers and mountains so that taxpayers are not stuck with the $1 billion bill."

"The Senate on Tuesday gave final approval to an overhaul of the nation’s 40-year-old law governing the use of toxic chemicals in homes and businesses, sending the bill to President Obama for his expected signature."

"A team of scientists at Harvard University says it has come up with a bionic leaf — a system that could use solar power and hydrogen-eating bacteria to generate liquid fuel. The findings, described in the journal Science, offer an alternative path to making carbon-neutral solar fuels."

NOAA has released a new plan for researching and managing ocean noise and its impact on marine life.

"Sen. Rand Paul (R-Ky.) is withdrawing a hold that prevented Congress’s bipartisan chemical safety overhaul bill from moving forward in the Senate."

"More than 450 groups on Monday called on Congress to reject the Trans-Pacific Partnership if it comes up for a vote this fall, saying the trade deal would allow fossil fuel companies to contest U.S. environmental rules in extrajudicial tribunals."

"RIM OF CEDAR MESA, Utah — For centuries, humans have used the red sandstone canyons here as a way to mark their existence. ... Now, President Obama is weighing whether and how he can leave his own permanent imprint on history by designating about 2 million acres of land, known as the Bears Ears, as a national monument."

"Gas is cheaper than it has been in over a decade, and a nation weary of cutting back is getting behind the wheel and spending to make road trip memories."