Yifang Zhu in One Zero: Startup Molekule Is Using the California Wildfires to Sell Its Crummy Air Purifier

As a technology, air purifiers land somewhere between legitimate health device and dubious wellness product. Many health researchers suggest that certain purifiers can reduce harmful airborne pollutants. “I recommend that people buy HEPA-based filters,” said Yifang Zhu, a professor at the University of California at Los Angeles who studies the effects of air quality on human health.