(via D-News) There are 80,000 dams in the U.S., but only 3 percent of those dams create hydroelectric power. Why do we build dams and how do they affect the environment?
(via D-News) There are 80,000 dams in the U.S., but only 3 percent of those dams create hydroelectric power. Why do we build dams and how do they affect the environment?