solar still
distils water with substances dissolved in it by using the heat of the Sun to evaporate water so that it may be cooled and collected, thereby purifying it
en-GB/ˈsəʊlə ˈstɪl/
en-US/ˈsoʊlɚ ˈstɪl/
distils water with substances dissolved in it by using the heat of the Sun to evaporate water so that it may be cooled and collected, thereby purifying it