Can solar thermal power solve the worlds energy problems?

According to this link Europe uses 4,000 terawatts of energy but in the normally unusable deserts of North Africa and the Middle East 630,000 terawatts fall unused. If solar thermal plants covered the desert about the size of Austria it could power the whole entire world. The technology is cheap and includes an ability to store the energy for nighttime needs. If all this is possible why are Earth are we not employing this clean, cheap, abundent source of energy?
http://www.spiegel.de/international/world/0,1518,550544,00.html

Best answer:

Answer by Maria S
well i think that solar power can solve most of the power problems we have…but the technology used for this is not popular and not at all cheap …solar power can be used anywhere not only in the middle east or north africa…
but the equipment for this , is not something that anybody could afford…so people cant really use it, till a solution is found for the financial part.

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