We already have hydroelectric power, generated by massive dams that use rushing river water to turn energy turbines. It’s powerful, clean stuff and certainly worth continuing to use. But it’s nothing compared to the untapped energy of the ocean’s currents, which, if properly harnessed, could power the planet several times over. Sadly, solar and wind cornered the renewable market early on, and as a result, tidal power is only just now getting reconsidered due to its enormous potential.
Oyster, for example, is essentially a giant hinged flap bolstered to the ocean floor, which swings back and forth with the current and pumps enough resulting energy to the surface to power thousands of homes. There’s also the Terminator turbine, designed by Air Force Academy engineers and inspired by aircraft, which ditches drag technology for wing-like lift, in order to (theoretically) harness an astonishing 99% of available tidal power (as opposed to the standard 50%). And the potential isn’t limited to raw energy generation, either. Perth, Australia just started using a tidal-powered desalination plant that can provide drinking water for more than half a million residents.