AS we all know, smoking is not only bad for the smoker but also bad for the second hand smoker. So in many public places such as library, bathroom in building, and inside the building has made a sign sad “No Smoking” If you disobey this rule you get fined. In my opinion this rule are very useful and good for people. I have some specific reasons to support my idea.First of all, I think smoking in the public spaces are being a huge selfish human. As I’ve said above, smoking has great impact on second hand smoker too. For instance, my uncle had passed away because of lung cancer. I remember what doctor has said. “Second hand smoking is sometime even more fatal to our lives” So if you smoke in the public places you are harming other innocent people.In addition, it is very unpleasant to others. We all know that public place means place where whole society owns it. Because all the people can use it there are lots of non-smokers in those people who uses the place. So it can be very unpleasant for them; non smokers to smell cigaratte in this place. To sum up, because smoking in public is being very selfish man and it maybe unpleasant to the non smokers I think making rule about not to smoke in public place is very thoughtful decision. If you smoke in public place you should feel guilty and think about you increasing more number of lung cancer patient.