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.
Not exactly. Hydroelectric dams need to be constructed on large rivers that have a large drop in elevation. The dam stores water that can then be controlled by engineers to regulate the water flow to produce electricity on demand at a specific rate. Unlike coal, which is burned to produce steam to turn the turbines in a coal power plant, the water used in hydroelectric dams keeps flowing. Thanks to the natural water cycle, hydroelectric power plants take advantage of an easily renewable energy source!