PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY
Cannabis joints. Marijuana seen with cannabis joints. Marijuana (centre left) is the leaves and flowering tops of the hemp or cannabis plant (Cannabis sativa). The joints (lower right) contain marijuana mixed with cigarette tobacco. Smoking cannabis causes mental relaxation and heightened senses. Large doses may lead to panic, fear of death and illusions. Prolonged use may lead to psychological dependence and lung damage.
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