By installing a skyscraper in the center of all deserts, then installing walls that capture all air pressure around the desert, transferring the air pressure through pipelines similar to those used for oil to push sand up to the top of the tower, where it falls back down the center in a river to turn turbines, similar to that of the cycle of snow that turns our dams. By increasing the surface area in the sand or substance that gets blown up to the top, air pressure can push up more weight per amount of that substance. I am not sure if aerogel which has an incredible amount of surface area to dissipate heat, would also work when crumpled up into aerogel sand as a river flow better then that of sand.