Tides

Tidal power, or tidal energy, is a form of hydropower, which exploits currents in the water and water movement. There are categories of tidal power. The two main types it can be classified into are the use of kinetic energy and the use of potential energy. Kinetic energy is movement; for example: is the movement of the waves coming to the shore. Potential energy is energy stored in the object of which is about to have movement. Like stretching out a rubber band, you've stretched it out, but you haven't released it. More people are using this because it has a lower cost. Barrages, which are dams or irrigation systems, use potential energy during the high and low tides. The motion of the Earth and moon generates it. The tidal power is caused by the gravitational pull of the moon on the water. Because of the gravitational force the water levels vary often. Tidal energy is some what related to wind energy because it uses wind turbines. Some disadvantages are if the turbine isn't in the right position, maybe because of high and low tides, it won't pick up debris and it won't capture flow.