In reply to Timmd:
> I whole heartedly agree, we're not putting nearly enough money into developing tidal and renewable energy, and fusion and fission too. In the UK we're really daft not to exploit the fact we're surrounded by tides...
We are trying, and I am in favour of sensible schemes, and there are trials ongoing for wave generators , but the sea is a tough place.
There are also knock on concerns.
The example that I have used before was of putting a wave machine array offshore, and capturing x megawatts of power from the sea off that shoreline, so then the power of those waves is depleted by that amount of power, and the waves are smaller, so if there was a surfing resort there , that would not work, so that bay is ruled out.
There thare are bays where the shore is eroded, that then feeds sand to a seaside resort down the coast, no waves , no sand no resort.
Then there are wildlife concerns, feeding area, wading burds looking for food that depend on the waves, which might disrupt what they feed on.
So yes we need the technology , and it has to be efficient and robust, and cost effective, but you then cannot just put them anywhere .
Similar concerns exist for Tidal.