Here are some useful website and organistions:
Marijuana Anonymous (UK)
Stichting Romanian Children's Humanitarian Foundation
People Against Drug Dependence & Ignorance - PADDI Foundation
Drugs: It’s just not worth it
Our 35-page book gives clear and easy to read facts and advice aimed at teenagers and young people.
Written evidence from Cannabis Skunk Sense by CanSS, posted 09 05 2019
Police sidestep drug laws. by CanSS, posted 21 04 2019