c8ac90fa-19c8-4af2-ac5f-78bf19082857
prompter
what's that thing they invented for the developing world where you put it on a dirty lake and the sun rays evaporate the water and it goes up and into a container and it's clean
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c8ac90fa-19c8-4af2-ac5f-78bf19082857
assistant
It's called a solar still. It is a device that uses the heat energy from the sun to evaporate and purify contaminated water. The water vapor then condenses on a clean surface, such as a plastic sheet, and flows into a container for collection as clean water. They are often used in developing countries where access to clean drinking water is limited.
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49c02794-301f-459f-918a-bb27de5b7b65
prompter
do these water contain minerals?