Chemical-Sniffing Technology Fights Australia's Graffiti Vandals

Like other cities across the globe, Sydney, ​Australia, has spent huge amounts of money battling graffiti writers who deface buildings, public transport vehicles and even monuments. The city's fleet of commuter trains bear the blight of graffiti scribbled with markers or splattered with spray paint. While surveillance cameras help, there are too many cars to monitor at all times, so officials here are hoping a new surveillance system based on an "electronic...

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