FoE Scotland chief executive Duncan McLaren said wave and tidal power could supply a fifth of UK energy needs and that Scotland was ideally placed to generate a significant amount of that energy.
Many in the utility industry worry that the most vulnerable part of the power system is its work force, as a wave of retirements is depleting the supply of linemen and other craftsmen who keep the lights on.
This computer has no internal powersupply, but when a specially designed reader sends out a radio signal, a tiny antenna draws power from the wave and uses it to wake the computer up.