Cigarette smokers are 10 times more likely to be daily marijuana users

(Columbia University's Mailman School of Public Health) Daily marijuana use has been on the rise over the past decade. Now, a new study found that cigarette smokers are 10 times more likely to use marijuana on a daily basis. Marijuana use occurred nearly exclusively among current cigarette smokers, daily or non-daily smokers, compared with former smokers and those who have never smoked. However, even among non-smokers, daily marijuana use is increasing, particularly among youth and female cigare...