Anti-marijuana ad's dubious claim a scary hit with parents

[rwana]

http://i.cbc.ca/1.2877583.1418914600!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_460/marijuana-brain.jpg Health Canada's focus-group testing of anti-marijuana ads found parents reacted most strongly to claims that smoking too many joints can lower IQ in young people. The IQ effect has been challenged by medical researchers, but the department launched a TV and internet campaign asserting the claim anyway.


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