I was never able to find the publication again but I read an article one time about the work of 2 Australian professors (I forget which kind) who designed a giant circle shaped verical axle wind turbine with 2 tubes that suck sea water up along the sides and sprays it up in the air with the brine dropping near the turbine. An array of those they claimed could create dense clouds that produce a lot of rain at some (according to them) surprising ratio to cost.