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Sewer sensors sniff out signs of bombs and drugs


BOMB-MAKERS or chemists with Breaking Bad crystal-meth labs better watch out. A sewer system full of chemical sensors could sniff out their homemade labs as part of a €4.5 million European Union-funded research programme called Emphasis.

The idea is that once a sewer sensor finds telltale traces of home-brewed explosives, it sounds an alarm and a police team carrying a portable, high-resolution sensing unit can be dispatched to narrow the search and pinpoint the exact location. The technique could also be modified to look for signs of illegal drug factories.

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