By Leah Holman
How It Works
Tidal energy is produced by utilizing the sun and moon's gravitational forces, or tides. The energy comes from the tide shifting from low to high. The supply of energy that we get from tidal underwater turbines is plentiful and reliable, but it's not easily converted into electrical power. This in turn makes it expensive. It's considered a renewable energy source because the tides rise and fall consistently in a fairly regular pattern. The only real drawback to tidal energy is the altering of the ecosystem when the turbines other means of harnessing the energy are put in place. The damages can include reduced flushing, winter icing, and erosion. These things can change the vegetation of the area and disrupt the balance. Tidal energy is a great, reliable energy source because it is consistently capable of producing the energy we need.