Down go the dams. Many dams are being torn down these days, allowing rivers and the ecosystems they support to rebound. But ecological risks abound as well. Can they be averted?
Marks
Jane C
JC
D000818:Animals; D001130:Arizona; D003247:Conservation of Natural Resources; D017753:Ecosystem; D005399:Fishes; D020387:Food Chain; D019015:Geologic Sediments; D011210:Power Plants; D045483:Rivers