American Lung Association - Findings on Marijuana
http://www.lung.org/associations/states/colorado/tobacco/marijuana.html
EXCERPTS
“Like tobacco smoke, marijuana smoke contains cancer-causing chemicals.”
“There are 33 cancer-causing chemicals contained in marijuana.”
“Marijuana smoke also deposits tar into the lungs. In fact, when equal amounts of marijuana and tobacco are smoked, marijuana deposits four times as much tar into the lungs.”
“Marijuana has many effects on the brain. It impairs short-term memory and motor coordination; slows reaction time; alters mood, judgment and decision-making; and in some people can cause severe anxiety or loss of touch with reality. Because of these effects, marijuana use more than doubles a driver’s risk of being in an accident.”
“Marijuana also affects the heart. The heart rate is raised 20-100 percent shortly after smoking, an effect which can last up to 3 hours and put users at an increased risk of heart attack.”
“Marijuana is often thought to not be addictive. However, marijuana dependence is the number 1 reason why youth in Colorado and the U.S. seek substance-abuse treatment.”
http://www.lung.org/associations/states/colorado/tobacco/marijuana.html
EXCERPTS
“Like tobacco smoke, marijuana smoke contains cancer-causing chemicals.”
“There are 33 cancer-causing chemicals contained in marijuana.”
“Marijuana smoke also deposits tar into the lungs. In fact, when equal amounts of marijuana and tobacco are smoked, marijuana deposits four times as much tar into the lungs.”
“Marijuana has many effects on the brain. It impairs short-term memory and motor coordination; slows reaction time; alters mood, judgment and decision-making; and in some people can cause severe anxiety or loss of touch with reality. Because of these effects, marijuana use more than doubles a driver’s risk of being in an accident.”
“Marijuana also affects the heart. The heart rate is raised 20-100 percent shortly after smoking, an effect which can last up to 3 hours and put users at an increased risk of heart attack.”
“Marijuana is often thought to not be addictive. However, marijuana dependence is the number 1 reason why youth in Colorado and the U.S. seek substance-abuse treatment.”
http://www.lung.org/associations/states/colorado/tobacco/marijuana.html