It's unknown whether marijuana use can cause lung cancer, but research does show smoking pot can cause other health problems.  That's according to Dr. Chris Nevin-Woods, public health director and medical officer for the Pueblo City-County Health Department.

"What I have seen is some other pulmonary problems like chronic bronchitis and asthma in marijuana smokers," Nevin-Woods offered.

The head of the National Institutes of Health said recently that the drug's link to lung cancer hasn't been seriously studied.  However, researchers have tied regular pot use to a drop in IQ among adolescents.  Nevin-Woods says the drug is addictive and she "wouldn't recommend it."