Thermal and e-film solar kytoon (balloon + kite) systems could also be implemented at very low altitude, for projects such as Desertec - Wikipedia , the difference being that solar panels would not be directly on the ground, which would allow secondary uses, including perhaps food crops that would be facilitated by the shadows (thanks Joe Faust) carried by the solar kytoons, in addition to lowering the temperature and making some places easier to live.