How much electrictity does tidal energy produce?

Question

How much electrictity does tidal energy produce?

Answer 1

Tide energy is generated by the relative motion of the earth, sun, and moon.

Physics 101 says for every action there is an opposite and equal reaction.

If you take energy out of the tide what will happen to the delicate gravitational balance between the sun, the moon, and the earth?

Answer 2

There's enough energy created by the tides to meet all of human's  demand for electricity.