"Chris Hogg" wrote in message
...
On Wed, 13 Aug 2014 07:59:36 +0100, "Nightjar \"cpb\"@" "insert my
surname here wrote:

On 13/08/2014 07:12, harryagain wrote:
http://thinkprogress.org/climate/201...l-power-wales/



The only renewable energy that I think is worth investing in.

The last two paragraphs, referring to a tidal barrage being proposed
in the US, worried me slightly. The last sentence includes the phrase
"The setup would use pumps to replicate natural tides when
necessary...". Sounds suspiciously like perpetual motion to me! OK, so
it won't be, but it's not obvious what it does actually mean.

You don't really think proper engineers are going to fall for the perpetual
motion theory?

There is a system where the tidal lagoon is used to store energy using the
turbines as pumps.