A cause of Water Pollution Everything living in this world depends upon water. Wood comes from plants so everything made from wood has used water. This shows that water is a very important element we need to live. Nowadays, we use shortcuts to do everything. When the factory lets out smoke, part of it is chemicals. As we know, the smoke forms clouds. As a result when it rains we get acid rain which is very harmful. People sometimes throw garbage into water. Factories dispose their wastes into the bodies of water around them. This makes the water dirty and maybe harmful. Some diseases spread because of dirty water. People and animals drink this water and it is most harmful to their health. Water is a very good solvent and even though it may look clean, it has some impurities that the eye can't see.