Deserts are 'waste land' not good for much, but they do have a lot of energy coming down from the sun. They are usually too far away from cities to make transmission of the power worthwhile, but, if they were used to make a useful transportable energy source (hydrogen?) on the spot, it seems to me large amounts of pollution free transportable energy could be generated from the sun, using 'worthless' land. Transportation of the end product is another question, but in some parts of the world, deserts are close to oceans meaning the product could be shipped.
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