Marijuana Is Harmful
Table of Contents: Further Readings
"Marijuana: The Facts,", 2001.
The Drug Enforcement Administration (DEA) is the federal agency charged with enforcing the nation's drug laws.
  Marijuana is an addictive drug with significant health   consequences to its users and others. Many harmful short-term   and long-term problems have been documented with its use.
      The short-term effects of marijuana use include: memory   loss, distorted perception, trouble with thinking and problem   solving, loss of motor skills, decrease in muscle strength,   increased heart rate, and anxiety.
      In recent years there has been a dramatic increase in the number   of emergency room mentions of marijuana use. From 1993-2000,   the number of emergency room marijuana mentions more   than tripled.
      There are also many long-term health consequences of marijuana   use. According to the National Institutes of Health, studies   show that someone who smokes five joints per week may be taking   in as many cancer-causing chemicals as someone who smokes   a full pack of cigarettes every day.
      Marijuana contains more than 400 chemicals, including   most of the harmful substances found in tobacco smoke. Smoking   one marijuana cigarette deposits about four times more   tar into the lungs than a filtered tobacco cigarette.
      Harvard University researchers report that the risk of a heart   attack is five times higher than usual in the hour after smoking   marijuana.
      Smoking marijuana also weakens the immune system and   raises the risk of lung infections. A Columbia University   study found that a control group smoking a single marijuana   cigarette every other day for a year had a white-blood-cell   count that was 39 percent lower than normal, thus damaging   the immune system and making the user far more susceptible   to infection and sickness.
      Users can become dependent on marijuana to the point they   must...