... electricity. There are two types of hydroelectricity dams called dams and run-of-river, or water-diversion. But both types of dams have serious environmental effects. They can change the flow of rivers, increase the amount of sediment in the water and decrease oxygen level; in return, this can ... costs for hydropower are the expenses for building and maintaining the power stations and the dam itself. But in return air, chemical, water, or thermal pollution would not be present" ("Wind, Water, Sun, or Coal"). Advantage to hydropower is increase in water level that can increase the chance ...

• Word Count: 3357
• Approx Pages: 13
• Grade Level: High School