Like i am assuming you mean smoking cigarettes, not something else. Disadvantages are that you won’t be able to run as fast as you would without smoking.  So if you are involved in any type of sports, it’ll harm your abilities.  It constricts your blood vessels so your heart has a harder time pumping blood to all your extremities.  It is also highly addictive and for most people it will be extremely difficult to quit once they become not only physical, but mentally addicted to smoking. Your fingers and toes will suffer a bit due to poor circulation as well as your penis if you are a male. Eventually you may suffer from Erectile Dysfunction because of poor circulation.  This should probably be the only reason you need to not smoke.  But all of these are the consequence of years of smoking and you will most likely not feel these when you are still a young adult. The pros: It will make you look 10x cooler in front of other people, guaranteed, haters going to hate… Joking aside, it’ll help relieve stress to a certain point.  There are people who manages to smoke in moderation and they are perfectly fine smoking 2-3 cigarettes a day.  Of course they are obviously not addicted to the substance like some people are who require 1-2 packs a day, lucky them.
    Just some information: back in the early to mid 90s, pollution level was so bad where I lived that in a city nearby, it was estimated that if you spent the whole day outside of that city, it was equivalent to you smoking a pack of cigarette.  These were times when there was so much smog in the air that if you were outside playing football, the people on the other side of the field would be a haze due to the pollution.  With that said, I am not suggesting that it is OKAY to smoke a pack of cigarette a day.  I am merely pointing to the fact that our environment also plays a strong role in our health and we should be more concerned about the lack of funding for EPA and other agencies that are supposed to protect our environment than what people voluntarily inhale themselves.
    The smokers do not know the hazards of smoking. Smoking when it has matured it kills hunger. It has carcinogenic elements which cause cancer of the windpipe, lungs, and abdomen. A moment’s kick in a puff of smoke now gets mixed in one’s blood. There is always a craving for it and one tends to puff a cigarette again and again. Thus smoking is a permit self destruction like drugs. Smoking is also prevalent among our youth. Initially they taken a few preliminary puff of cigarettes for fun. But these become habit and then it is a road to destruction. When they have matured to smoking they can’t leave it howsoever they may try. Nicotine, the poisonous substance in tobacco makes them their easy victims. To lead an active adult life, we should avoid smoking.
    I don’t really see any benefits to smoking     which is why I’ve never done it. However, when you go out at the university the smoking shelter is the best place to get to know random people; but that doesn’t mean you have to smoke. Almost 40% percent of men who are heavy smokers will die before they reach retirement age, as compared to only 18 percent of nonsmokers. The Women who smoke face an increased risk of cervical cancer, and pregnant women who smoke take a chance with the health of their unborn babies.
    But the good news is that when you quit smoking your body begins to repair itself. Ten years after you quit, your body has repaired most of the damage smoking caused. Those who wait until cancer or emphysema has set in are not so lucky – these conditions are usually fatal. It’s one more reason to take the big step and quit smoking now. Many smokers do not realize that there are actually substance abuse treatment programs designed to help them quit the bad habit of smoking….

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