Land | 3 | |
Birds | 2 | |
Ocean / Sea | 2 | |
Marine Mammals | 2 | |
Weather | 2 | |
Air | 1 | |
Arachnids | 1 | |
Fish | 1 | |
Invertebrates | 1 | |
Land Mammals | 1 | |
Surface Waters / Wetlands | 1 |
Human Health | 2 | |
Air Quality | 1 | |
Energy | 1 | |
Buildings | 1 | |
Pets | 1 | |
Sports / Recreation | 1 | |
Transportation | 1 |
1 | 3 | 2 |
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1 | 2 | 1 | 2 |
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SPRING | 3 | |
FALL | 2 | |
SUMMER | 1 |
Canada | 2 | |
Norway | 1 | |
United States | 1 |