If you leave a clear bottle of water in the sunlight, the ultraviolet rays will kill any harmful microbes in that water, making it drinkable … but it has to sit in the sun for at least six hours. A ...

This powder helps make water cleaner, sticking to dirt and separating it from the water. The product is called PolyGlu, which is a coagulant made from fermented soybeans. It mixes with dirt and ...