Clean drinking water is essential for good health and disease prevention. But according to the World Health Organization, some 663 million people — one out of every 10 people in the world — do not have access to safe water. But science may soon help. As Faiza Elmasry tells us, researchers have developed nano-scaled membranes that could filter contaminants from water faster and more cheaply than current methods. Faith Lapidus narrates.
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