Wind energy continues to be an important part of renewable resources. However, other promising forms of renewable energy exist. Coastal states have a potential source of renewable energy in waves and tidal currents. Snohomish PUD is evaluating the use of tidal energy as a renewable energy source and detailed studies have been performed at seven locations in and around Puget Sound for tidal generators. These devices are similar to windmills but generate energy by using tidal currents to drive turbines located on the seabed.
Collection of videos on tidal energy: http://tinyurl.com/dxc2b7p