Also in the Guardian, Katherine Hamnett gets very, very excited about concentrated solar power as a source of clean energy. (Just like the trial power station the Australian Federal government is helping to fund.)
Problem is, as far as I can see, the article says nothing about what happens if a protracted cloudy period covers the power stations. Still, if environmentalists don't go nuts about tens of square kilometres of desert being covered by mirrors, I guess it could help, provided you don't lose much of the benefit in the process of getting the electricity the hundreds of miles to where it is needed.
At least if you use solar power to do the direct electrolysis of water into hydrogen, you have something you can store to generate power later. Someone's looked at that, I assume?