One environmental problem affecting the supply of fresh water is that groundwater is being pumped from aquifers
Answer:
Plains located to the south of the Himalaya are lacking in rivers.
Explanation: I am very sure
All
Climate patters - people migrate to temperate regions
Traditions - people migrate to areas where famous things happened
Elevations - most people don't live in the mountains
Ethnicity, Religion, Language - people of the same ethnicity, religion, and/or language will stay together
I would have to go with Sewage mostly because it smells and because it can really hurt the environment. Plants can die and it just is gross to smell. So this would definitely pollute the earth. I hope this helped! :D