How Can We Ensure a Safe Water Supply?

BASF’s high-tech ultrafiltration membranes have pores 3,000 times smaller than the diameter of a human hair. This even makes it possible to turn wastewater into drinking water.

from Videos | Smithsonian http://www.smithsonianmag.com/videos/category/sponsored/how-can-we-ensure-a-safe-water-supply/
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