Surface Waters / Wetlands | 5 | |
Weather | 4 | |
Land | 2 | |
Atmosphere | 1 | |
Microbes | 1 | |
Ocean / Sea | 1 |
1 | 1 | 2 | 3 | 1 |
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SUMMER | 4 | |
SPRING | 2 |
United States | 3 | |
Russia | 2 | |
South Korea | 1 |