This kind of acid in rain is actually beneficial because it helps dissolves minerals in the soil that both plants and animals need. Recently there has been some concern that the acidity of rain caused by man has increased over the last several decades. Acid rain attacks wildlife, crops and lakes. It can cause the death of forests and damage buildings and monuments. It is even harmful for human beings.
Acid rain is caused by pollution.
Pollutants like sulphur dioxide and nitrogen oxide stay in the atmosphere and eventually react with the moisture in the air. When this polluted moisture falls to the ground, it is called acid rain. The source of these pollutants is not only from burning fossil fuels, but from both motor vehicle and chemical manufacturing exhaust. Sulphur dioxide is unlike other kinds of acid pollution because it does not react with moisture until it has been taken long distances by the wind. Even worse is that rain and snow are not the only ways the environment can be damaged by air pollution.