These cheap paper water filters remove lead, arsenic, and bacteria

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Just pour water through the Mesopaper and it does the rest.

On a visit to Bangladesh in 2011–where an estimated 20 million people are exposed to arsenic in local drinking water–scientist Liangjie Dong worked with a team to teach residents how to use a filtration system he designed that could make the water safe. The technology worked, but it wasn’t self-explanatory: it required training in how to use a special cartridge, and special instructions for how to dispose of it after use.

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