#DoingYourBit: Air quality tracker to go | DW English

Smog impacts people’s health and causes lung diseases. The problem: You can’t really see or smell it. Now a start-up has built a device which measures air quality and tells users when the concentration is high.
For a related story, go to: http://www.dw.com/en/stuttgart-builds-moss-covered-wall-to-fight-air-pollution/a-37866760