Light Intensity
Temperature
Moisture Levels
Soil pH Content
Soil Mineral Content
Wind Intensity & Direction
Carbon Dioxide Levels (Plants)
Oxygen Levels (Aquatic Animals) - bioindicators -clean water > stonefly nymph
-some water pollution > freshwater shrimp
-moderate water pollution > bloodworm
- high water pollution > sludgeworm
- very high water pollution > no living insects
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