A small team of engineers based in Cornwall, England, have made a breakthrough with the development of a turbine that they claim could solve the commercial viability of tidal power. Known as the Osprey turbine, the technology can be used to create electricity offshore at sea -- or in tidal rivers and inland waterways.

"If this is successful, as we are confident it will be, we intend to manufacture a range of small units for river applications, followed by a range of cross flow turbines for conventional micro hydro plants." Pat Cooke, Able Engineering & FreeFlow 69