Quick! Hold your breath. The air your breathing right now is filled with chemicals that might be slowly giving you asthma. It might be the materials your building is built with, or it might be the frogs. That’s right: frogs.
It's no secret that residents of carcinogen-thick cities have above average incidences of asthma. Now a new generation of pocket-sized pollution detectors, developed by scientists at Columbia University and the Pacific Northwest National Laboratory, could pinpoint the types of toxic air particles inhaled by people on a daily basis.