| Along the seafloor of Lake Huron, there are several karst sinkhole formations through which groundwater enters the lake bottom and carries with it remnants of an ancient sea. A team from the National Oceanic and Atmospheric Administration’s Thunder Bay National Marine Sanctuary and Institute for Exploration first discovered... Read more |  |
| Seventy tons of toxic carbon tetrachloride made its way down the Kanawha and Ohio Rivers in the February of 1977. The spill raised tremendous concern over how well the bevy of recently instated environmental laws were actually being enforced. Citizens had no way of knowing for sure whether such harmful compounds would be entering... Read more |  |
| Sediment in the Spring Creek Arm of the Keswick Reservoir in California previously contained high concentrations of copper and zinc, the source of which was contaminated runoff from the Iron Mountain Mine Superfund Site. In order to protect the downstream Sacramento River ecosystem, which is a valuable commercial fishery and... Read more |  |
| Heavy urban development has caused excess stormwater runoff in the Cleveland area. As a result, the city’s metroparks can experience flashy floods, which damage aquatic habitat, erode river banks, and carry sediment into Lake Erie. This increased stormwater runoff has had a number of undesirable effects on the parks system... Read more |  |
| The Beartooth Mountains, within the central U.S. Rockies, are home to more than 3,000 mountaintop lakes. Because of their high altitudes (between 5,000 and 11,000 feet) and the resulting extreme cold and deep snowpack, the lakes stay frozen for up to 10 months per year. These climate conditions make the lakes sensitive to external... Read more |  |