Ing.Jhonatan Martinez , , Medicine
Eng Book- The Marijuana (Harmful or Healthy)- Download Free PDF
1.7 % of Americans over the age of 12 struggle with
marijuana abuse or dependence.
(National Survey on Drug Use & Health, 2010)
9% percent of people who try marijuana develop
abuse and dependence; 17% if they try before
the age of 18.
(Hall and Degenhardt, 2009)