Quick Answer
A solar still can be constructed using a shallow hole, a container, and a clear plastic sheet. Dig a hole deep enough to hold water and place a container in the center. Cover the container with a clear plastic sheet and weigh down the edges with rocks.
Gathering Materials
To build a solar still, gather the following materials: a shallow hole (about 12 inches deep and 18 inches wide), a container (such as a plastic tub or bucket), a clear plastic sheet (such as a tarp or plastic wrap), rocks, and a source of water. Ideally, the container should be slightly larger than the hole to prevent the water from overflowing.
Constructing the Still
Dig the shallow hole and place the container in the center. Add water to the container, leaving about 2-3 inches of space at the top. Next, place the clear plastic sheet over the container, securing it with rocks around the edges. This will create a dome-shaped structure that traps warm air and allows water vapor to rise.
Improving Efficiency
To improve the efficiency of the solar still, you can create a wick system. Cut a small hole in the center of the plastic sheet, just above the container. Place a piece of string or a wick material (such as a cloth or paper towel) through the hole and into the container. This will allow the water to rise up the wick and collect in a separate container or on a nearby surface.
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