Notes

HYDRO ENERGY  Hydro energy is generally generated form running water using various mechanical methods.
 E.g. :  Dams  Tidal Barrages  Ocean Thermal Energy Conversion (OTEC) system
 Advantages :  Produces very less amount of carbon dioxide.  It is also being used to control flood and for irrigation purposes.
 Disadvantages:  Natural environment is destroyed. Hydroelectric Dam

Tidal Energy: Energy that is obtained by difference in sea levels due to high and low tides mainly due to the gravitational pull of the moon is called tidal energy. This energy can be converted into electrical energy. Conversion of tidal energy into electrical energy Wave Energy: The kinetic energy produced by huge waves is called wave energy. This energy can be also converted into electrical energy. Conversion of wave energy into electrical energy
8. Ocean thermal energy: Ocean thermal energy is obtained by the difference created due to hot water on the surface and cold water deep inside. Steam is created due to this and that particular area is known as hot spring. This energy is also used to generate electricity with the help of the steam created. Production of ocean thermal energy thermal energy

Hydroelectric Energy
Hydroelectric Energy produces energy through power plants, some such as; Micro-scale, small-scale and “run-of-the-river.” A dam is built to trap water, usually in a valley where there is an existing lake.
Water is allowed to flow through tunnels in the dam, to turn turbines and thus drive generators. Notice that the dam is much thicker at the bottom than at the top, because the pressure of the water increases with depth.Hydro-electric power stations can produce a great deal of power very cheaply.