The other reason is that the smoke itself contains toxins, called particulate matter
[1] Smoking is primarily practiced as a route of administration for psychoactive chemicals because the active substances within the burnt, dried plant leaves (or other chemical) can vaporize into a gaseous state and be delivered into the respiratory tract, where they are rapidly absorbed into the bloodstream through the lungs and can reach the central nervous system
Additionally, it can exacerbate existing health conditions, such as asthma or hypertension, in pregnant women, further compromising their well-being
Take slow, steady puffs, and take your time to enjoy the experience
Global tobacco regulations increasingly require strict serialization and track-and-trace systems to combat illicit trade and ensure supply chain transparency