BBC: A tidal turbine near the mouth of Strangford Lough has begun producing electricity at full capacity for the first time. The SeaGen system now generates 1.2MW, the highest level of power produced by a tidal stream system anywhere in the world. The system works like an “underwater windmill” but with rotors driven by tidal currents rather than the wind. It has been undergoing commissioning trials since May. SeaGen will now move towards full-operating mode for periods …