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.
Too much pollution is generated when the dams are in operation. Almost all rivers that can be dammed for power generation have been dammed already. Hydropower uses a nonrenewable resource that is quickly being depleted. The cost of generating power is much too high.