New Delhi, Feb. 23 -- Vaping may seem like a less harmful substitute to traditional smoking, but it can cause serious damage to the lungs. Unfortunately, e-cigarettes are gaining popularity with each passing year among youth, a disturbing trend which can wreak havoc with people's lungs. Vaping can expose one to nicotine, ultrafine particles, flavourings such as diacetyl, cancer-causing chemicals, heavy metals such as nickel, tin, and lead, which can be harmful to respiratory health. Popcorn lung, or bronchiolitis obliterans, is a rare lung disease, which can cause damage to the tiny airways in lungs and can lead to scar tissue formation, blocking airways. People with this condition have symptoms like coughing, wheezing and shortness of br...