Is it possible to identify a cannabis grower by just looking at the above picture? Well, Dutch police has been identifying and arresting cannabis growers from the lack of snow on their roofs!
In several occasions, the police in the Netherlands has swooped on houses after noticing that their roofs were not covered in snow. You see, the cultivation of cannabis requires heat lamps for nurturing the plants that increases the temperature of the house! Knowing that, being the only house in the neighbourhood with no snow on the roof is a clear indication that something suspicious is going on, right?
By the way, the Dutch police are not the only ones to identify plantations by heat signals. In 2013, the West Midlands Police department in the UK released a video that showed a cannabis cultivation in an apartment in Birmingham seen through a thermal-imaging camera: (the article continues after the ad)