Land | 31 | |
Weather | 10 | |
Plants / Kelp | 9 | |
Surface Waters / Wetlands | 9 | |
Air | 7 | |
Ocean / Sea | 7 | |
Land Mammals | 4 | |
Atmosphere | 1 | |
Marine Mammals | 1 |
Buildings | 13 | |
Human Health | 8 | |
Transportation | 8 | |
Safety | 5 | |
Energy | 4 | |
Sanitation | 4 | |
Agriculture | 2 | |
Air Quality | 1 | |
Sports / Recreation | 1 |
20 | 6 | 3 | 2 |
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2 | 2 | 4 | 5 | 4 | 6 | 2 | 4 | 2 |
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SPRING | 11 | |
SUMMER | 10 | |
FALL | 8 | |
WINTER | 2 |
United States | 10 | |
Canada | 4 | |
Russia | 4 | |
Norway | 2 | |
Puerto Rico | 1 |