It's not only cigarettes. Teens smoke marijuana, LSD, weed, etc. One in four high school students in the U.S. continue to smoke cigarettes. It's not only high school students, but college student smoke as well. Usually they stop after graduating from high school, but not all of them do. About 60% of the students at University of Pennsylvania don't smoke anymore or have not smoked and 40% of them do smoke. Smoking cannot only mess up teenager's life but it also leads to Alzheimer's disease. Alzheimer's Disease is a common form of dementia of unknown causes, progressive memory loss and mental deterioration associated with brain damage. .
Laboratory and clinical researched that cigarette smoke contain around 4000 chemicals, some of them which are highly toxic. Nicotine is a major ingredient of tobacco smoke, and is highly addictive. Smoking cigarettes may cause the 419,000 deaths per year in the U.S. Smoking also increases the risk of cancer of the lungs, larynx, oral cavity, esophagus problems, kidney problems, and pancreas problems. As well as the risk of chronic bronchitis, emphysema, and stroke. About 70% of the public started smoking as a teenager. .
Marijuana, is one of them most used drug that teens use. Marijuana is a dried leaf, stem and flower, smoked in the form of a cigarette. This is the most well known drug and most used drug. Marijuana can be a very harmful drug. About 41.7% of high school seniors smoke marijuana. The percentage will tend to increase and decrease. The chart below shows the percentage of seniors smoking marijuana. Marijuana was once used as a medicine, but now it is now used extensively as a drug. Smoking Marijuana can impair reading comprehension, memory, speech, problem-solving abilities, and reaction time. .
Tobacco is just a common name that is applied to two plants of the nightshade family, used for smoking and chewing and as snuff. There are two very popular cigarettes, Marlboro Country and Camel.