In a similar vein, one idea that has often crossed my mind (and offered free to any taker): In most tropical coastal areas, there is an abundance of both humidi

In a similar vein, one idea that has often crossed my mind (and offered free to any taker): In most tropical coastal areas, there is an abundance of both humidity and sunlight. So why not use large banks of solar powered dehumidifiers to extract moisture from the air as water?