Chemical-Sniffing Technology Fights Australia's Graffiti Vandals

June 23, 2015 03:47 PM
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Cities and towns all over the world spend huge amounts of resources battling graffiti writers who deface buildings, public transport vehicles and even monuments. Authorities in Sydney, Australia, hope a new chemical-sniffing technology finally will stop vandals from scribbling on walls in the passenger areas of commuter trains. VOA's George Putic has more.