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Beijing

  • A low-cost semitransparent air filter can reportedly collect 99 percent of harmful pollution particles thanks to a dense web of nanoscale polymer fibers (Photo: Cui/Stanford)
    Environment
    Low-cost air filter could help Beijing breathe easy
    Material scientists at Stanford University have developed a highly effective semitransparent air filter that can collect 99 percent of harmful pollution particles, thanks to a dense web of nanoscale polymer fibers. The low-cost filter doesn't require power to function.