There are many life threatening, as well as psychological, dangers due to the use of marijuana. Life threatening dangers include, cancer, breathing, immune system, asthma, driving ability, heart rate, blood pressure, and reproduction. The Psychological findings include, short term memory, attention span, "lasting effect", schizophrenia, withdrawal, and symptoms in newborns, and children. These certain dangers may be associated with the prolonged use of marijuana, and may cause permanent damage.
Marijuana is known to contain more of some cancer causing agents than filtered tobacco cigarettes. People who smoke marijuana inhaled three times as much tar and retained one third more tar in their lungs than tobacco smokers. The carbon monoxide level in marijuana smokers was five times as high as tobacco smokers also.
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