Nasal congestion Nasal congestion is a stuffy nose, and can be accompanied by blocked ears, sore throat, and more. Pleural effusion Pleural effusion is buildup of fluid in the pleura and can cause difficulty breathing or chest pain.
A hydroelectric dam is essentially a mechanical gateway that can control how often, how much, and how fast the water is allowed to passed through. Water above the dam is collected and stored into a reservoir.
How do Dams Work? Hydroelectric dams use water to turn turbines that generate electricity. The Three Gorges Dam, which is the world's largest hydroelectric dam, incorporates locks that allow the passage of river traffic. The Hoover Dam.