August 8, 2011
The marijuana growers of California's notorious "Emerald Triangle" wrestle with bringing their shadow economy into the light of day.
Walker Lake in northwestern Nevada has been dying for years, but locals and government officials are determined to restore it.
A recent oil spill in Montana's Yellowstone River reminds Westerners that not all such environmental disasters happen in the Gulf of Mexico.
Researchers are trying to restore the damaged, acidic soil around abandoned hardrock mines with the help of biochar, a special form of charcoal.