You may cough when you smoke pot, but you’re not killing your lungs, according to a new study published Wednesday. The long-term study examined 5,000 people from three American cities and found no consequences to lung health from smoking pot. Previous studies had mixed results, leaving researchers with major questions about marijuana’s impact on health. Scientists behind the study said pot smokers smoke less than cigarette smokers, and their method of inhalation may help protect their lungs. They also stressed that their work was not a blanket statement about marijuana’s overall long-term healthiness.