Nearly 80 percent of disease in developing countries is linked to bad water and sanitation. Now a scientist at Michigan Technological University has developed a simple, cheap way to make water safe to drink, even if it’s muddy.
"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."
"It’s a different story if the water is murky... to purify your water, you first have to get the clay to settle out, a process called flocculation. Working with student Brittney Dawney of Queen’s University in Ontario, Pearce discovered that one of the most abundant minerals on Earth does this job very well: sodium chloride, or simple table salt."
"Salt is inexpensive and available almost everywhere. And it doesn’t take very much to make muddy water clear again."