Clear Creek in Texas. Flood control proposal would destroy Houston Bayou. Green River in Colorado and Utah. Dams threaten fish. Presumpscot River in Maine.
Dams threaten fish.
Clark Fork in Montana. Proposed mine threatens fish and wildlife. Mussels hurt Hudson ecosystem Experts have discovered a serious threat posed by zebra mussels, a foreign species that migrated to the northeastern United States in the late 1980s and sharply reduced food supplies for freshwater clams. Scientists at the Institute for Ecosystem Studies in Millbrook, NY, say the mussels are sucking up so much oxygen from the Hudson River that much of the ecosystem is approaching a danger point at which other aquatic creatures begin to flee or die. Mussels also remove from water small particles that cloud the water and reduce the penetration of sunlight.