What is Tidal energy?

Tidal energy is the energy derived from the tides of the oceans. Tides are caused by the gravitational force of the sun and the moon, and they contain a tremendous amount of mechanical energy. This energy can be used to generate electricity. In India, three sites have been selected for generating tidal energy — Gulf of Kutch and Gulf of Cambay in Gujarat, and Sundarbans along the east-west of West Bengal.