These include nicotine, tars and gases such as carbon monoxide. Nicotine acts as a stimulant or a depressant depending on how fast you puff. Nicotine is the reason for tobacco smoking becoming a habit. Many of the tars are known to cause cancer. The gas carbon monoxide is best known as the poisonous waste product from car engines.
Tobacco smoke has an immediate affect on health.
Nicotine increases the heart rate and causes a slight increase in blood pressure. Skin temperature is lowered and appetite lost. Also physical endurance is lessened. Tobacco smoking increases the risk of major health problems. Tobacco smoking is the main cause of lung cancer and also cancer of the mouth and larynx.