5 | How does the human population influence the availability of freshwater? (Advantages and Disadvantages) How do humans influence water quality in NC’s river basins, wetlands and tidal environments? | 2.4 Evaluate how humans use water. 1. Evaluate human influences on freshwater availability. 2 Evaluate human influences on water quality in North Carolina’s river basins, wetlands and tidal environments. | Pucker effect |