Ontario Government bans smoking medicinal cannabis in public places March 11, 2016Dr. Barry Dworkin Health Headlines Commentary for March 11, 2016 [display_podcast] Source: Medical marijuana users steamed by ban after Liberal U-turn Related posts: Leaderless in Ottawa Club Drug Use Carries Uncertain Risks No conclusions can be drawn from observational survey data on teen concussion and mental health consequences and on cannabis study showing brain changes Chest CT findings in cannabis smokers demonstrates similar lung disease changes akin to smoking tobacco. cannabis