10) MARIJUANA USE HAS NO EFFECT ON MORTALITY: A massive study of California HMO members funded by the National Institute on Drug Abuse (NIDA) found marijuana use caused no significant increase in mortality. Tobacco use was associated with increased risk of death. Sidney, S et al. Marijuana Use and Mortality. American Journal of Public Health. Vol. 87 No. 4, April 1997. p. 585-590. Sept. 2002. 9) HEAVY MARIJUANA USE AS A YOUNG ADULT WON’T RUIN YOUR LIFE: Veterans Affairs scientists looked at whether heavy marijuana use as a young adult caused long-term problems later, studying identical twins in which one...