Cigarettes are a major health risk, as they contain many harmful substances. The most harmful things in cigarettes are nicotine, tar, and carbon monoxide.
Nicotine is a highly addictive stimulant drug present in cigarettes that causes users to become physically and psychologically dependent on the drug. It has been linked to increased risks of heart disease, stroke, and various forms of cancer.
Tar is a sticky, black substance that is produced when tobacco is burned. It contains a variety of toxic chemicals that are known to cause cancer, as well as damage to the lungs, heart, and other organs.
Carbon monoxide is a colorless and odorless gas that is produced when cigarettes are burned. It reduces the amount of oxygen available to the body, which can lead to serious health problems such as heart disease, stroke, and even death.
In addition to these three substances, many other toxic chemicals are found in cigarettes, including formaldehyde, arsenic, and lead. These substances can cause a variety of health problems, ranging from respiratory problems to cancer.
Overall, the most harmful things in cigarettes are nicotine, tar, and carbon monoxide. These substances can cause serious health problems, and they should be avoided at all costs.