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07-31-2007, 04:16 PM
from http://www.cbc.ca/health/story/2007/07/30/marijuana-cigarettes.html
[QUOTE]Last Updated: Monday, July 30, 2007 | 7:02 PM ET
CBC News
Smoking just one joint has the same impact on the lungs as smoking up to five cigarettes, says recent research out of New Zealand.
In the study, adults aged 25 to 49 were divided into four groups: those who only smoked marijuana, those who only smoked tobacco, those who smoked marijuana and tobacco, and those who didn't smoke at all.
Researchers tracked their respiratory function for a 10-year period, using high-resolution CT scans, lung function tests and a respiratory and smoking questionnaire.
Those participants who smoked only marijuana reported wheezing, coughing, chest tightness and phlegm. The researchers found that their smoking habits damaged their lungs and stopped them from functioning properly.
They discovered that the small airways in the lungs of pot smokers had narrowed, meaning less oxygen and waste products could be transported to and from the blood vessels.
They also noted damage to the large airway, which blocked airflow and forced the lungs to work much harder.
The effect on the lungs of each joint was found to be equivalent to smoking between 2
[QUOTE]Last Updated: Monday, July 30, 2007 | 7:02 PM ET
CBC News
Smoking just one joint has the same impact on the lungs as smoking up to five cigarettes, says recent research out of New Zealand.
In the study, adults aged 25 to 49 were divided into four groups: those who only smoked marijuana, those who only smoked tobacco, those who smoked marijuana and tobacco, and those who didn't smoke at all.
Researchers tracked their respiratory function for a 10-year period, using high-resolution CT scans, lung function tests and a respiratory and smoking questionnaire.
Those participants who smoked only marijuana reported wheezing, coughing, chest tightness and phlegm. The researchers found that their smoking habits damaged their lungs and stopped them from functioning properly.
They discovered that the small airways in the lungs of pot smokers had narrowed, meaning less oxygen and waste products could be transported to and from the blood vessels.
They also noted damage to the large airway, which blocked airflow and forced the lungs to work much harder.
The effect on the lungs of each joint was found to be equivalent to smoking between 2