Re: OT: Global Warming? New Data Shows Ice Is Back

On Mon, 25 Feb 2008 01:43:22 -0000, tim <TimJ@xxxxxxxxxxxx> wrote:

On Sun, 24 Feb 2008 14:23:51 -0800, Alistair wrote:

So why are we not building solar energy power stations. The principles
are already established and there is plenty of desert land to build
upon, although that will introduce further problems (maintenance where
vegetation grows in the shade of solar panels).

Solar power is very expensive. It does not work at night, invoking the
problem of storage, which is also expensive and inefficient. It is also
greenhouse negative for at least 3 years, because of the energy required
to produce all the gear involved.

That's true of photovoltaic cells. It's cheaper to use sunlight to turn water into steam,
which can drive a turbine and can be STORED.

Another way to store energy is to pump water to a higher elevation, then recover it by
letting the water flow downhill.
.

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