National (U.S.)

"For the first time in more than 50 years, the federal government has recommended lowering the level of fluoride in drinking water."

"From the tortillas to the salsa to the chips and marinades, everything served at Chipotle will now be GMO-free."

"One of congressional Republicans' major attempts to regain a say over water resources projects while maintaining their self-imposed earmark ban may have hit a brick wall."

"A single pulse flow of water reconnects the ‘American Nile’ with the Sea of Cortez for the first time in decades"

"A federal appeals court ruled Friday that a group of California companies cannot sue to stop the Environmental Protection Agency’s (EPA) efficiency and greenhouse gas rules for heavy trucks."

"HOUSTON -- As Gina McCarthy spoke for a second straight year at one of the world's top energy gatherings, the U.S. EPA administrator defended a plan to cut carbon dioxide emissions and told the power industry to focus on its ability to innovate."

"The number of breeding males in the greater sage-grouse population of the United States and part of Canada has declined by 56 percent in recent years, in a sign of trouble for the ground-dwelling bird, a study released on Friday showed."

An electric utility industry group this week released a report warning that EPA's "Clean Power Plan" to address climate change could hurt grid reliability. The report offers ammunition for the plan's opponents -- especially Republicans from coal-mining and coal-burning states. But a number of critics say the report's analysis is flawed.

"It’s probably in your garage and on your lawn. And it’s used on nearly every acre of corn and soy. But what risks does it pose?"

"Scientists, planes and instruments descend on San Juan Basin to find roots of the massive greenhouse gas hotspot."