To find out more about the effects of cannabis and tobacco visit the Scottish Government's Know the score website.
For the latest statistics visit Drug Misuse Information Scotland.
Scottish Drugs Forum
Scottish Drugs Forum is the national non-governmental policy and information agency working to reduce drugs harm in Scotland.
Drugscope is an independent organisation which aims to inform policy development and reduce drug-related risk.
ASH Scotland 'Tobacco with cannabis' training
Young Scot - drugs information
British Lung Foundation report 'The Impact of cannabis on your lungs'
Edinburgh based coalition of young people, clubgoers and others who've come together to produce real and relevant information about how to reduce the risks involved in using drugs.
Everything you ever wanted to know about the world of drugs - interactive site for 11 - 14 year olds.
Talk to Frank: cannabis
This page on the Talk to Frank website provides information on cannabis and skunk, the effects of using cannabis. Produced in England.
This website from HIT provides information on cannabis, tips and techniques, a quiz to assess cannabis use and a self-help feature for cutting down or stopping cannabis use. Produced in England.