According to the German publication, Technology Review, Siemens is developing a cell phone with a built in gas sensor. The phone (if it were to ever see the light of day) could be used to detect ozone, bad breath, and as a breathalyzer (detecting alcohol on your breath). And who said that cell phones and cars don’t mix? The story (in German) is at http://www.heise.de/tr/aktuell/meldung/50020.

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