What they need to do is shape the tunnel into a wing, then when the tide comes in and out the wing (tunnel) came flap up and down producing electricity. 1st Green tunnel!
flap up and down producing electricity. 1st Green tunnel!
The main tube made of piezo crystals wrapped in a waterproof membrane and a couple of honking large extension cords at each end!!!
Tide flows in/ out, load changes with the traffic, moon phase...Free electricity!
Norway could sell all their unneeded smart electric meters to California.