The Royal Society has written a report that says that more than 20% of Britain's electric could come from tidal sources.
They also say it would be more reliable than wind energy and are optimistic that the 2 main methods being trialled in the UK will be proven "relatively soon".
They estimate that tidal barrages could provide 15% of our energy needs when rolled out and scaled up, whilst tidal stream (which is based on a kind of like underwater turbine) would provide at least 5% and probably more as the technology is improved.
So we could be getting between 40 and 50% of our electric from renewables in the next couple of decades if the government doesn't start back-peddling (again).
More here.
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