Nuclear power or save the planet?

A recent feature in the Guardian raised some interesting points about renewable power.

A field of mirrors focussing the sun's energy on a furnace can be used to power conventional electricity turbines. Several of these power stations have been operating successfully in desert regions around the world for many years. Engineers have estimated that covering just 0.5% of the world's deserts with these ingenious devices would meet the entire planet's electricity demand with ease.

It seems like the ultimate answer - there's lots of sunshine in Africa so they can get rich selling their electricity to Europe and solve all their problems. We no longer need to buy oil from the late Saddam Hussein and other undesirables. Global warming will be halted in its tracks.

So what's the catch? Well part of the problem seems to be that somebody wants to invest billions and billions of our money in a new nuclear power programme which will generate about 3% of the world's electricity by 2050 - if ever - at many times the cost of these ingeneous solar powerstations. The other problem apparently is that we would need a new pan-Europe high voltage electricity grid to move the power around - and that requires those same people who want their nuclear power to dig into their budgets and build one.

No wonder you're not heard about Concentrated Solar Power before. Doesn't it just make you feel that the planet is safe in the hands of our elected leaders? Erm.... No!