People have the right to decide over their own life and thus have the right to smoke if they want to. However, as smokers have the right to smoke, other people have the right to not smoke or be forced to. Hence I think it is a good rule that some countries prohibit people to smoke in public areas. As a result, other people, who choose not to smoke, don't have to inhale the toxic "cloud" coming from cigarettes. Better yet, the rule may make smokers to reduce their smoking habits and create better images for the working places which have smokers as employees.
Good work! Well presented introduction!
Smokers think that when they smoke outside a building the smoke won't come in to the building but unfortunately it does.
...This is going a bit out of topic. You need to keep a good alignment with your topic which specifically refers to the public places and office buildings. So stick to that without deviating from what it suggests.
By A regulation that prohibit people smoking in public areas would discourage smoking by making it a hazzle for the smokers to find a place where they can smoke.
havehaving a rule to prohibit people smoke around public areas makes smokers have to walk a long way to have a smoke.