Human activity has a great impact on the quantity and quality of local water supplies. humans can try to increase awareness and understanding with studying paths, pathogen, pollutants, etc. which will not change as a result of human activity and awareness? a) rainwater runoff into local streams b) pinpoint possible sources of pollution c) mapping local surface and groundwater paths d) studying of land use activities that affect local streams

 A) rainwater runoff into local streams

The surface runoff due to rain water is a natural process of erosion of materials such as soil minerals, sediments, fertilizers and chemicals which are deposited to the water body. Hence, create contamination. This contamination is caused naturally and it is not under human control. Therefore, human activity and awareness will not change the cause of such pollution.

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