Food, water and power from thin desert air

Wavelength-selective agrivoltaics are here: solar panels that are transparent in the wavelengths chlorophyll can use, while generating electricity from other wavelengths. Meanwhile, the harvesting of water from even air people consider dry is an area of intensive development.Active systems use electric heat pumps to chill surfaces on which dew then collects -commercialized by companies such as Watergen. More intriguing are passive harvesters. One recently developed in Switzerland manages to chil...