Smoking is an activity in which a person burns a specific substance and inhales the fumes produced. The substance most commonly used for smoking is tobacco which, when burned, produces tar. This tar contains many toxic chemicals that cause harm to the body, mainly to the mouth and lungs. Additionally, many people don't realize how dangerous smoking is. In the first few seconds of smoking, a mixture of gases is released around the eyes, nose and throat. Then the eyes start to bleed and the throat starts to get sore. Usually, small bristles called cilia work to clear the bronchi and lungs of foreign and toxic substances. However, when a person starts smoking, the function of the eyelashes is paralyzed until death. Then the toxins easily enter the lungs and alveoli. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original Essay Studies say that 70% of what a person inhales while smoking turns into tars in the body that travel instantly to the throat and lungs. Here it kills healthy lung cells. Additionally, smokers who consume an entire pack of cigarettes a day end up consuming a cup of tar in a year. This usually leads to loss of sense of smell and taste. Furthermore, the lungs cannot absorb all these toxic substances. For this reason, these substances immediately enter the bloodstream and circulate to the heart and the rest of the body. Due to the destruction of the alveoli, less gas exchange occurs in the lungs and capillaries. The therapy lowers the level of oxygen in the blood and causes an increase in heart rate due to the increased workload. Fourteen years can be subtracted from the lifespan of each male and female smoker (University Health Center, 2009). Smoking is very common among adults and adolescents; and can lead to a dangerous disease known as coronary artery disease (CAD). However, smoking is not yet banned. First, it is important to be aware of the relationship between smoking and CAD to reduce the risk of this disease. Tobacco is a harmful substance and, if smoked, affects the heart and blood cells. Furthermore, they affect the efficiency of the heart and also the vitality and shape of the blood vessels. In such circumstances, this can lead to an increased risk of atherosclerosis. For example, atherosclerosis is a type of disease that causes plaque to build up in the arteries. As a result, it will limit the supply of oxygenated blood to the body parts. Over time, if plaque continues to build up in the arteries, CAD will occur, leading to chest pain, heart attack, heart failure, arrhythmia, and death. Additionally, nicotine and carbon monoxide make the heart beat faster, increasing the risk of blood clots. For further clarification, the rate and blood pressure will fluctuate because nicotine acts directly on the heart and nerves that manage breathing. In fact, smokers who suffer from hypertension are more likely to become impotent than non-smokers. Additionally, 1 to 2 mg of nicotine is added to each cigarette, which can reach the brain in 8 to 10 seconds. The second factor that helps reduce the risk of DKA is knowing the reasons why smoking should be illegal. For further understanding, smoking causes heart diseases like CAD and making it illegal will reduce the risk of these diseases. When blood flow from the coronary arteries to the heart becomes obstructed, heart tissue dies due to lack of oxygen supply. This is known as a heart attack. The heart attack damages the.