Human modification of environment
Humans have tried to control the water by creating dams and by doing that the consequences are the land that was supported by the water turns into a to desert and the living environment dies. Also in Dams floods are frequent and can flood the the environment that can still support life and damage that. One big example is the Hoover Dam.
These two topics I have talked about relate because when we create dams and when desertification comes in the people who live there now have to migrate to wear there is water and with the more people in one area the more pollution there will be causing a much quicker decrease in fresh water and a increase in diseases.
Level 1 question: What is pollution?
Level 2 question: How has pollution effected the water?