It's every parent's nightmare. Your teenager gets heavily involved in drugs, and you don't even know it's happening.
In the first of our new series from Fixers - the campaign that helps young people make a difference - we meet teenager Jade Clement who says cannabis nearly ruined her school career, and cut her off from family and friends.
With government figures showing that nearly a third of young people have tried cannabis, and new research suggesting it may damage teenagers' brains, she's warning that the drug is no joke.
Police have discovered a cannabis 'farm' in Sussex. Officers found about 200 grown cannabis plants, along with hydroponic cultivating equipment, when they were called to an unoccupied flat in Eversfield Place, St Leonards. They appeared to have been there for some time.