The Earth was once a clean and organized world; however, this organization lasted only for a few centuries. When Man came, he did so many things that caused much change in the world. One of the major byproducts of the many hazardous activities of Man is pollution. This pollution has been affecting the health of men for many years now. There are many types of pollution: air pollution, water pollution and land pollution. Of these three, the air pollution is the most unobvious one; that is, people see the least physical evidence of this pollution compared to the other two. However, this type of pollution often harms more people than water or land pollution.

One of the many harmful effects of this type of pollution is Cough. However, viruses, that inflame the air passages, could also trigger coughs, most simple causes of coughs come from air pollution. When there is air pollution, the air is not pure; there are many unfriendly particles flying about the air. These unfriendly particles could be caught up in the air passages; then, as a natural reaction of the irritation of the passages, one would cough to get rid of the unwanted aerial visitors.

Although most simple coughs could be caused by pollutions, it does not mean that all simple coughs could be just be caused by air pollution. Some small coughs could be symptoms of something serious.