Write an essay on smoking cigarettes are they hazardous

Smoking cigarettes is dangerous for the body and for the environment, because of many chemicals and substances produced by this hazardous product. It can converted in addicted to it and at the same time you will feel reduced our ability to do sport  and exercise.

And also it is dangerous for the heart, reducing his capacity to work well .

We just have to breathe more to get the same quantity of oxygen and for this reason we get tired sooner, we can notice it especially if we don’t run quite often, it feels like you don’t have breathe. Moreover its chemical composition doesn’t help to recycling it easy so the environment too is damaged a lot

at hatfield elementary school, there are 504 students in 7 classes. each class has the same number of students. what is a good estimate of the number of students in each class?