See, the idea would be to use a huge glass dome to catch evaporated water over the ocean. And a trough around the sides of the dome would funnel into a pipe to take the water to be further treated. The problem for me is that this idea seems so obvious that there has to be a reason why it’s not already happening.
To specify, I meant using a series of small domes just off shore. Let’s say 50 ft. diameter and you just build a lot of them like a solar panel grid.