"newsposter" wrote in message
...
It's probably stupid idealistic naiveity but I've often wondered why
renewables can't eventually produce 100% of the world's energy
requirements.

Enough pump storage systems could surely buffer the demands of the
'Eastenders' broadcast on a cold Boxing day.
Enough tidal power systems would surely provide an entirely predictable

A company which operates near here - http://www.engb.com/ has spent a lot
of their own and gov money on tidal energy.

They have concluded that it is not a viable source of significant amounts of
energy

David b