This is actually possible today but the newest technology hasn’t quite matured and scaled up. See this article: https://news.mit.edu/2020/solar-extracts-drinkab

This is actually possible today but the newest technology hasn’t quite matured and scaled up. See this article: https://news.mit.edu/2020/solar-extracts-drinkable-water-1014 https://news.mit.edu/2020/solar-extracts-drinkable-water-101... > Existing AWH approaches include fog harvesting and dew harvesting, but both have significant limitations. Fog harvesting only works with 100 percent relative humidity, and is currently used only in a few coastal deserts, while dew harvesting requires energy-intensive refrigeration to provide cold surfaces for moisture to condense on — and still requires humidity of at least 50 percent, depending on the ambient temperature. > By contrast, the new system can work at humidity levels as low as 20 percent and requires no energy input other than sunlight or any other available source of low-grade heat.