1. Diseases can often be a major cause of illness in areas that have polluted water.
2. Inhabitants are often killed in the process and their numbers dwindle causing a unbalanced ecosystem.
3. Since the quality of water is low it results in costly treatments or remediation of the environment.
The Muslim Turks were controlling the Holy Land in 1095, and thus why Pope Urban II had to call a meeting to start the Crusade Wars to regain the Holy Land.
Explanation:
B. The oceans contain almost all of Earth's freshwater
