Erosion | 2 | |
Algal Bloom | 1 | |
Debris / Trash | 1 | |
Death / Die-off / Decline | 1 | |
Flooding / Draining | 1 | |
Glacier Change | 1 | |
Permafrost Change | 1 | |
Pollution | 1 | |
Sinkhole / Crater | 1 | |
Pathogen | 1 |
Safety | 4 | |
Sanitation | 2 | |
Water Security | 2 | |
Water Management | 2 | |
Economic Impact | 1 | |
Human Health | 1 | |
Buildings | 1 | |
TOURISM | 1 |
5 | 1 |
|
|
United States | 3 | |
Canada | 2 |