E-cigarettes were invented in 2003 as a less harmful alternative to traditional cigarettes. They work by heating a liquid that contains nicotine and flavorings to produce an aerosol that is inhaled. While e-cigarettes may be less risky than smoking, they are not completely safe. Their long-term health impacts are still unknown, and some studies have found links between the particles in e-cigarette aerosol and cardiovascular problems. India has banned e-cigarettes due to concerns about rising youth addiction and unknown health risks. Violators of the ban can face imprisonment and fines.