Smoking

Just like the Prohibition in the 1920's, a popular substance used by most of the public cannot be illegialized. There will be increased violence, because people have to fight to keep their addiction kept under control. This will also increase the private usage of tobacco, as people will secretly grow it on their own. Each year, about 440,000 Americans were killed due to tobacco, and most began using some form of tobacco before 18.(1) Smoking doesn't just affect you, it also affects the people around you with second-hand smoke. In 2002, 38,000 people reported died because of second hand smoke. It is very difficult to really classify if someone died of second hand smoke or not, because there may be other facotrs as well as the smoking.(2) Another aspect about smoking is the tobacco companies. There have been many advertisements about non-smoking ads that are focused on the tobacco companies. They are making the public realize that tobacco isn't as glamorous as it used to be. It has 250 harmful substances in it, and 50 of those cause cancer.(2) Another reason to quit smoking is that smoking doubles your chance of having a stroke. You are also more likely to develop heart disease.(3)
Sources:
1-http://www.abovetheinfluence.com/facts/drugs-tobacco.aspx#
2-http://www.beverlyfund.org/secondhand.html?gclid=CPyS06GVh6ACFUFM5Qodzj3hlQ
3-http://www.cdc.gov/tobacco/basic_information/health_effects/heart_disease/index.htm