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‘It was an accident’: the scientists who have turned humid air into renewable power
(www.theguardian.com)
This is a most excellent place for technology news and articles.
It's possible to use direct mechanical power harvested from renewables to turn the fans, though depending on the effiency it might make more sense to just convert that mechanical power directly into electricity. But, for example, a windmill (as opposed to a wind turbine) could harvest large scale natural air flow and then mechanically leverage that to move humid air at a smaller scale. Same with dams.