Ocean / Sea | 3 | |
Air | 1 | |
Land Mammals | 1 | |
Microbes | 1 | |
Marine Mammals | 1 | |
Surface Waters / Wetlands | 1 | |
Weather | 1 |
Human Health | 10 | |
Transportation | 2 | |
Cultural Impact | 1 | |
Energy | 1 | |
Food Security | 1 | |
Sanitation | 1 |
4 | 3 | 1 | 2 |
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1 | 1 | 1 | 1 | 1 | 3 | 2 |
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WINTER | 4 | |
FALL | 3 | |
SPRING | 2 | |
SUMMER | 1 |
United States | 3 | |
Russia | 2 | |
Canada | 1 |