There is unequivocal evidence that habitual or regular marijuana smoking is not harmless and causes respiratory symptoms and airway inflammation. As you can see below and at 0:24 in my video Effects of Smoking Marijuana on the Lungs , if you take biopsies from the airways of those who smoke cocaine, cannabis, and/or tobacco, compared to nonsmokers, there is significantly more damage in the lungs of people who smoke, whether cocaine, marijuana, or tobacco
That means they are made legally in a factory with the approval of an overseas licensing authority, but often fall short of standards in the country where they are sold
Other options are pipe tobacco and roll-your-own cigars that offer more control over ingredients
Additionally, this effect usually occurs after finishing the cigarette, not during smoking
Burning them often produces toxic or even carcinogenic substances. Pascal Diethelm adds that the decree does not contain a single provision pertaining to the protection of consumer health