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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 not nearly that simple. In the US for example, widespread use of this technology along the coasts (where it's most effective) could mean middle america nearly never gets rain. Unfortunately, that's where the food comes from and it's no simple task to pump water from the coast to the midwest.