Topics
Effect of dams on
19
Environmental aspects
18
Hydroelectric power plants
15
Dams
14
Animals
9
Big game animals
7
Mammals
7
Habitat
6
Power utilization
6
Wildlife resources
5
Fishery resources
4
Fur-bearing animals
3
Aquatic biology
2
Fishes
2
Habitat (Ecology)
2
Migration
2
Modification
2
Moose
2
Pacific salmon
2
Plants
2
Research
2
White whale
2
Armed Forces
1
Environmental conditions
1
Estimates
1
Mammal populations
1
Water-power
1