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.
They also store water for fighting fires and can help control floods. Dams also give us hydroelectric power! U.S. dams provide almost 10% of the nationâs power needs. Hydropower is a renewable source of electricity that is friendly to the environment.