The Rocky Flats Plant outside Denver was a key U.S. nuclear facility during the Cold War.

Dungeness crab is one of the most valuable commercial fisheries on the U.S. West Coast, worth nearly $170 million ....

In a small cabin that serves as the Glacier National Park climate change office, Dan Fagre clicks through photos that clearly show the massive glaciers that give this park its name are in a hasty retreat.

Wildlife farming is being touted as a way to protect endangered species while providing food and boosting incomes in rural areas.

Scientists are closely monitoring a key current in the North Atlantic to see if rising sea temperatures and increased freshwater from melting ice are altering the “ocean conveyor belt” ...

Putting a price on carbon is an idea whose time has come, with even Big Oil signaling it may drop its long-standing opposition to a carbon tax.

The booming industrial center of Shenzhen is a showcase for Chinese efforts to cut CO2 emissions and make the nation's burgeoning cities more livable.

Five years after the nuclear power plant meltdown, a journey through the Fukushima evacuation zone reveals some high levels of radiation and an overriding sense of fear.

The top of the world is turning from white to blue in summer as the ice that has long covered the north polar seas melts away.

Marine protected areas in national waters have proven successful in helping depleted fish stocks to recover.