Smoking marijuana may do more damage to lungs than cigarettes, a new study suggests. The study, published Tuesday in the peer-reviewed journal Radiology, found marijuana may be linked to an increased risk of emphysema over smoking tobacco alone. Emphysema is a condition where the lungs’ air sacs are damaged until they eventually rupture, according to the Mayo Clinic. It can cause a long-term cough, shortness of breath and wheezing, and it's irreversible once it develops. Researchers found emphysema was more common in marijuana smokers than those who didn't smoke at all, and more common in marijuana smokers who were 50 and older than those who only smoked tobacco. The results come as states continue to legalize the drug and health experts, who are increasingly concerned with its impact on lung health, call for more research. Visit the link in bio to read more about the study.