Ginseng is a prized root in demand for it's wide use in traditional Chinese medicine. Some of the most valuable ginseng grows wild in Appalachia, but supplies are dwindling.
There's a new fear from climate change: bacteria and viruses buried in frozen ground coming back to life as the Arctic warms up. We went digging in permafrost to find out how worried we should be.
Interior Department Sec. Ryan Zinke announced the promotion of Paul Daniel Smith, who was reprimanded in 2006 for inappropriately using his position on behalf of Dan Snyder, who wanted a better view.
Just what exactly is permafrost? And what is happening now that it's warming up? To find out, we enter the Arctic Circle's secret world of ice and frozen history.
Hurricanes, fires and even hail contributed to billions of dollars in damages. The government study also finds that it was among the warmest years on record.
Residents of some Moscow suburbs complain their lives are being ruined by the smell and sight of giant garbage dumps that ring the city. There is no recycling of garbage in the Russian capital, all trash goes into the expanding landfills.
Authorities raised Mount Mayon's alert level to 4 out of a possible 5, indicating "intense unrest" and the possibility of a particularly violent, hazardous eruption within days.
Mount Kusatsu-Shirane suddenly erupted Tuesday morning, spewing volcanic rocks and belching a curtain of black smoke. An avalanche that followed injured at least 10 people.
One worker was taken to a hospital and 16 others made it out of the area safely. The fire was put out Monday night but rescue workers can't search for the missing until the site cools down.
Officials in the South African city of 3.7 million are restricting water usage amid fears it will run out of water by April 21. Experts say the crisis has been exacerbated by rapid population growth.