Air | 7 | |
Weather | 5 | |
Land | 2 | |
Land Mammals | 1 | |
Ocean / Sea | 1 | |
Plants / Kelp | 1 | |
Surface Waters / Wetlands | 1 |
Human Health | 3 | |
Air Quality | 2 | |
Buildings | 1 | |
Safety | 1 | |
Transportation | 1 |
2 | 2 | 1 | 1 | 1 |
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1 | 2 | 2 | 1 | 1 |
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SUMMER | 5 | |
FALL | 1 | |
WINTER | 1 |
United States | 2 | |
Canada | 1 | |
Russia | 1 |