First, make a separate introduction paragraph and mention whether you agree or disagree with the notion.
Second, align your ideas in further para using trigger words and linking phrases.
Third, Use as much formal language as possible. Avoid words like ''plain'', ''plus points''.
Fourth, reduce the number of paragraphs. make them three or four at max, and make a simple sentence structure so that you can control the balance among more than two joint sentences and grammar all at once.
For example,
It is clear, the less places be available for people to smoke, the less they could smoke., as they have to find the places which are allowed to smoke in and since they are not able to reach them easily, it is a nice way to smoke less.
it is obvious that if the places where people can smoke are less or not at easy access, they will smoke less in return. Because, for smoking, they have to find a smoking area and if it is not available, they will try to control their urge to smoke.