Tribal members protested the building of the controversial pipeline, near the Standing Rock Sioux reservation, because it would cut across burial grounds and threaten the reservation's water supply.
When deadly flooding rains swamped southern Louisiana last month, it destroyed lives and property. And it also caused millions of dollars of damage to the state's agriculture industry.
A deadly fungus is devastating frog populations around the world. In California, scientists are racing to find a way to immunize one species, mountain yellow-legged frogs, against the fungus.
The Standing Rock Sioux tribe had sought a temporary stop to work on the pipeline. But after the ruling, three U.S. agencies said work would halt in an area particularly sensitive to the tribe.
The Obama administration is halting construction on the pipeline after concerns were raised by a nearby Native American tribe. A federal judge previously ruled construction could proceed.
Brown signed two laws designed to be the most ambitious initiative on climate change in the country. The business community says the laws don't consider the economic impact on the state.
Alarmed Russians are sharing photos on social media of the red Daldykan River, located above the Arctic Circle. The Russian government thinks a pipeline leak from a local factory could be to blame.
Thirteen months after an Environmental Protection Agency mistake sent millions of gallons of bright orange wastewater into a Colorado river, the agency has announced a cleanup for the Gold King Mine.