Cannabis resin and herbal cannabis have significantly increased in potency and in price from 2006 to 2016, according to the first study to investigate changes in cannabis across Europe.

Cannabis resin and herbal cannabis have significantly increased in potency and in price from 2006 to 2016, according to the first study to investigate changes in cannabis across Europe.: http://bit.ly/2VkrhPK Read more... http://bit.ly/2Qenb7Y