For cannabis it is the “tobacco moment”. The long-suspected link between consuming cannabis and developing schizophrenia has been repeatedly confirmed by recent studies. Observers say that for cannabis the present moment is similar to that half a century ago when scientific proof of a connection between smoking tobacco and cancer became so strong that no serious doctor or scientist could deny it. Popular perception of the risks involved for the 2.3 million people taking cannabis in Britain over the last year has lagged behind evidence of its toxicity as shown in a mounting number of scientific studies. One recent expert survey of the evidence published by different scientists in different countries says that research “has consistently found that cannabis use is associated with schizophrenia outcomes later in life”.