Diane needs to do her homework. High CBD cannabis is neuroprotective and the Liberal Government is failing in its due diligence if it does not move to outlaw high THC/lowCBD cannabis in the marketplace. 
 
See Tzilos, G.K. et al., 2005, "Lack of Hippocampal Volume Change in Long-term heavy cannabis users" in American Journal of Addiction #14, pp.64-72 for compelling findings that show "There were no differences between nonusers and daily users in the specific regions of interest [nucleus accumbens, amygdala, hippocampus, and the cerebellum--areas high in cannabis receptors]. We found no evidence of differences in volumes b/t daily users and nonusers, adults or adolescents."

Through endless repetition, policy spokespersons and stake-holders attempt to set the national conversation around MJ being "unsafe." But the evidence is lacking. See my other post to find out why most MJ research on teens is flawed.