There are two main cannabis products found on the European illicit drug market: cannabis herb and cannabis resin. Cannabis is both illicitly cultivated in countries of the region and also trafficked, in sizeable amounts, within the region and from other regions. There is an increasing tendency for criminal groups operating in the region to run numerous small-scale cannabis plant cultivation sites, usually indoors, rather than fewer but large-scale outdoor plantations, in order to mitigate the risk of detection.