The pump storage hydro scheme is designed to "soak up" excess power generated by wind and wave farms, using it to pump water up to a reservoir.

BBC: Highland councillors support Lochaber hydro plan

The electricity generators operate like wind turbines but with blades driven by tidal wave action.

BBC: ?70m tidal power scheme off Anglesey wins approval

The research by the University of Liverpool found that the seabirds fed in nine areas earmarked for tidal, wind or wave power developments.

BBC: Les Etac gannetry