Tobacco contains the highly addictive drug nicotine and can be consumed through smoking, chewing, dipping, or sniffing in products like cigarettes, gutkha, and snuff. Smoking cigarettes exposes a person to over 4000 toxic chemicals and 60 carcinogens and significantly increases the risks of various cancers, heart disease, lung disease, and other health issues. Tobacco use is directly linked to many forms of cancer as well as other serious diseases.