Solar Thermal Power in North-Africa: How Much Land to Power the World?

Of course, the transport of all the electricity to where it would be used is a serious challenge. There are ways to minimize losses, but over such long distances, there will always be some.

Still, even with losses and the massive challenge of building the infrastructure, this shows the potential of solar power. And the red squares in the first picture are just to show the scale, the real thing could be much more decentralized and located closer to already existing infrastructure (and not all of it would be in North-Africa, of course. There are many sunny deserts in North-America, f.ex.).

Lets not kid ourselves and claim that the red squares are small, but with the price of solar power falling (both photovoltaics (PV) and solar-thermal), it is starting to look more realistic all the time. We have so much roof surface where PV could be used, and there are many deserts where using lots of land for solar-thermal isn't a problem.

Of course, we won't get there all at once. But looking at how prices are falling and production capacity is increasing, we definitely think that solar power has a bright future!

::Desertec: Strom aus der Wüste (German), via ::reddit