Study: Smoking Occasional Joint Not Bad for Lungs
Wednesday, 11 January 2012 | by Pat's Picks

Smoking a joint from time to time isn’t so bad for your lungs, say researchers at the University of California. The San Francisco Chronicle says the new study found that only heavy marijuana smokers—those who smoke more than 20 joints a month—were doing serious pulmonary damage to their bodies.
SOURCE: San Francisco Chronicle