Removing Hydropower Dams Can Restore Ecosystems
A free-flowing river supports abundant fish and wildlife, provides drinking water, and other intangible recreational benefits. But humans have sought to block rivers with dams for millennia. While dams have provided benefits like hydroelectricity and water storage, they have also been ecologically disastrous. Besides blocking fish migrations, these human-made structures can destroy seasonal pulses of water that keep ecosystems in balance. Some dams—especially those used for power—can deplete water in streams, leaving entire stretches of river bone dry.
