Smoking marijuana may be more dangerous to your lungs than you think.

A study by researchers at Queen Elizabeth Hospital in Birmingham, England, found that even short-term use of marijuana can damage the lungs of young people, BBC News Online reports.

The researchers tested the lungs of nonsmokers, cigarette smokers, and people who smoked marijuana. They found that the lungs of marijuana users had more damage than cigarette smokers' lungs.

The study was presented at a British Thoracic Society meeting.