Today from the CSP conference, this map, which shows the land mass required to power all the worlds' energy needs is about 2%.
What was interesting during the conference was the direct cost inputs were very realistic and are either today cost competitive or will be within two years.. Also the future cash cow for utilities once capital costs were gone, because the advantage of CSP or any alternative is that the fuel is free, which will make it with time cost competitive with any other type of energy.
If all cost were factored in over a ten to fifteen year period,, such as CO2 taxes, long-term fuel uses of uranium, oil, coal then CSP competes TODAY with any other type of energy., and it only become cheaper with time because fuel prices are guaranteed not to go up.
It is up to society and politicians to make the change.
