Researchers have developed a paper filter, which can remove virus particles with the efficiency matching that of the best industrial virus filters. The paper filter consists of 100 percent high purity ...
Millions of people live without safe drinking water. Is this simple design a life-saver, or a silly first-world solution? For as long as well-meaning nonprofits have been trying to help bring clean ...
Despite the global spread of commercial paper, Nepal still uses handmade lokta paper, made from the bark of local shrubs, in ...
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