Atmospheric Pollution

It is also called Air Pollution, (say: po-loo-shun) occurs when gases, dust particles, fumes (or smoke) are introduced into the atmosphere in a way that makes it negative to humans, animals and plants. This is because the air becomes dirty. 

But this is not all... There is another effect about air pollution: 

THE ACID RAIN or ACIDIFICATION

The emissions of gases come from the factories and cars, gases such as carbon monoxide, oxides of nitrogen, hydrocarbons and particulates.

Sometimes, when an air pollutant, such as sulfuric acid combines with the water drops in clouds, the water drops become acidic, forming acid rain. When acid rain falls over an area, it can kill trees and harm animals, fish, and other wildlife.