Smoke contains solid and liquid particles which are produced when organic materials, for example, wood, tobacco, or paper, are burned.

When a cigarette is lit, smoke is produced by the burning (combustion) of tobacco. Cigarette smoke contains high levels of harmful or potentially harmful chemicals, which are the main cause of smoking-related diseases.

Although some people may confuse them with cigarettes, e-cigarettes (also known as vapes or e-vapor products) and heated tobacco products are fundamentally different from cigarettes, and do not produce smoke. That’s because—rather than burning tobacco—these smoke-free alternatives instead release a vapor. This vapor does not contain solid particles and has much lower levels of harmful chemicals compared to cigarette smoke.