Des études ont montré que la consommation constante de marijuana, surtout en grande quantité, a des conséquences sur le plan physiologique: manque de concentration ou lésions au cerveau qui risquent de priver la personne d'une grande partie de son efficacité.
Studies show that the continued use of marijuana, particularly in a very heavy way, does lead to all kinds of physical consequences, such as a lack of concentration and brain damage of some kind that eventually leads to the person becoming a far less effective person.
