List some of the side effects associated with tobacco use.

Yellowing teeth
Lung cancer
Weight loss
Thats all I can think of of the top of my head, Also the most common.

You can get lung cancer (which mainly kills people 10 years earlier), bad teeth, can make your breath smell bad almost all of the time, can cause wrinkles and grayish skin, can make you addicted and harder to stop (you can't control the temptations on when you want one)

hope this is good info for you :D