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quote:I would also ask whether, in an environment where there is a shortage of water, using water for evaporative cooling is necessarily the best use of such a resource, and whether other cooling technologies could not do as well?
quote:If you use impure water for irrigation, then you are feeding those impurities into the soil. Some of the organic impurities may not be that bad, and may even help the fertility of the soil, but increased levels of salts could become a problem
quote:For instance, if you use impure water in evaporation systems, then I would imagine that you will leave residues that must be disposed of.