But how much more could it be when offshore wind, wave and tidal turbines are in place and generating power?

BBC: Balance of payments

Over the next year or two, offshore wind power pioneers will begin rolling out a fleet of 5 to 8 megawatt wind turbines for the coming wave of offshore developments.

FORBES: GE Gambles on Whopper Wind Turbines

The Offshore Renewable Energy (ORE) Catapult centre will focus on offshore wind, tidal and wave power.

BBC: Glasgow to host ?50m renewables headquarters

Ambitious plans for offshore renewable energy projects are crowding the waters--floating wind farms, tidal-power turbines and wave-energy barges--all expected in the next decade.

FORBES: Magazine Article