air filters

Science
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Scientists invent air filter that’s cheaper, greener, better – and soy

As air pollution continues to plague China, India and cities around the world, researchers have developed a new air filter that can block 99.94 percent of the most harmful particulates in smog as well as toxic chemicals that existing filters miss, including carbon monoxide, formaldehyde and sulphur dioxide. Even better, it’s inexpensive and eco-friendly, because it’s made of paper towels, bacteria and soybeans.