A new U.S. study has concluded that the use of e-cigarettes, called vaping, increases the risk of developing chronic lung diseases, but less so than smoking.The study, published in the American Journal of Preventive Medicine, surveyed 32,000 American adults between 2013 and 2016 who had no signs of lung disease when the study began.Scientists found that those who used e-cigarettes were 1.3 times more likely to develop chronic lung diseases such as asthma, bronchitis, emphysema, and chronic obstructive pulmonary disease.For people who used both e-cigarettes and regular cigarettes, the risk nearly tripled. Senior author Stanton Glatz, a University of California San Francisco professor of medicine, noted that many smokers did not abandon conventional cigarettes when they began using e-cigarettes.But the study noted that even for those who switched completely to…