Chemical-Sniffing Technology Fights Australia's Graffiti Vandals

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.

© La Voix de l'Amérique - mardi 23 juin 2015