It almost seems like there is not a whole lot to write about on this topic. As far as smoking goes, one could write a book about it. One could write about health factors, the expense of keeping up the habit and a lot more. On this level, when it's about smoking in public places, it depends on where you live. It seems like in most areas people cannot smoking outside anymore. However, if you think about it, there is a topic to writing a great essay by itself.
Ask yourself and put it into an outline of notes. When did smoking only in the outside start? When did smoking in a building start? Some of the answers are obvious to most people. It'll help to have the information right in front of you for your homework assignment. Think of a few reasons smoking in public buildings came to a halt and why. Consider what people think about it and why. How do people respond to it? What do they do? Do people respectfully smoke outside like they are supposed to now?
What do folks who smoke think about smoking indoors, whether it was in a public place or their house since they're more used to smoking indoors. Lots of people smoke in their homes unless they live in an apartment. But as far as smoking in a facility and not being allowed to what do people do. What has this done to the smoking rate? What age groups have had a change in the smoking numbers? Have any age groups had a change in the numbers.
These are a lot of questions to ask oneself. But by the time you jot the answer and notes to all of these questions and thoughts, you'll have a great thesis to put on paper. You may or may not think differently about smoking, but maybe you will. Or maybe someone reading your homework will have a different take. Either way, at least you will have a lot of valid points to put into your essay, and it will get you a good grade.