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Solar water disinfection method promises clean water for everyone
A scientist has developed a simple and cheap way to make water safe to drink, even if it is muddy. Nearly 80 percent of disease in developing countries is linked to bad water and sanitation. It's easy enough to purify clear water. The solar water disinfection method, or SODIS, calls for leaving a transparent plastic bottle of clear water out in the sun for six hours. That allows heat and ultraviolet