Final answer:
Tobacco products contain numerous harmful chemicals, including carcinogens such as benzopyrene, acrolein, and nitrosamines. Regulations and restrictions on tobacco products have been implemented to reduce their negative health effects.
Step-by-step explanation:
It is important to note that the question does not specifically mention the banning of tobacco products, but rather asks about ingredients used in tobacco products that have been banned.
However, it is known that tobacco products contain numerous harmful chemicals, including carcinogens. Some of the most potent carcinogens in tobacco smoke include benzopyrene, acrolein, and nitrosamines. Other carcinogens in tobacco smoke are radioactive isotopes, including lead-210 and polonium-210. While regulations and restrictions on tobacco products have been implemented to reduce their negative health effects, the specific banning of ingredients in tobacco products may vary depending on different countries or regions.