Marijuana-scented scratch-and-sniff cards are being posted to hundreds of households in a bid to detect illegal cannabis farms.
Crimestoppers, which runs the campaign, said the cards would help people to recognise the smell of cannabis and report suspected plantations to police.
The charity said there was a 15% rise in the number of cannabis farms found in homes between 2011 and 2012.
http://www.bbc.co.uk/news/uk-21841995
More money wasted on the 'war on drugs'. Well in.