The Environmental Protection Agency on Wednesday imposed new standards for mercury, lead and other toxic pollutants that are discharged into the nation's rivers and streams from steam electric power plants.
Ecuador's Cotopaxi volcano, which began erupting in August after being dormant for 138 years, on Thursday coughed up a two-kilometer-high column of ash, officials said.
Strong winds are whipping up loose volcanic ash from the eruption of an Alaska volcano more than a century ago.
Five years ago, a Michigan Technological University entomologist set loose a swarm of tiny wasps in the woods around Calumet, Mich. His aim: to combat the invasion of a shiny, green beetle deadly to America's ash trees. Now ...