Perhaps you didn't consider the fact that this technology can in fact reclaim the desert. It actually puts water back into the aquifer. In Tenerife where they built the first one, it was all saline intruded land and nothing grew there due to thousands of years of agriculture pulling water from the aquifer. After they started the greenhouse up all the sudden native vegetation began sprouting up around it. There is a group planning to use this technology to reforest the Sahara Desert. Check it out Sahara Forest Project. Nothing against what the guy in your video is doing, obviously it is great. But by the same token there is nothing wrong with using a seawater greenhouse to create an ideal cool humid environment for growing crops so that they require only a tenth of the water used in open air agriculture while at the same time generating excess freshwater and refilling the aquifer using only the energy of the sun and the wind. By the way the seawater greenhouse doesn't use any pesticides, this is one of the big benefits of this system over traditional greenhouses that use lots of dangerous pesticides. The saltwater evaporators naturally keep the pests out without the need for spraying synthetic chemicals.
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