When the PH of the rain water below 5.6 due to the presence of oxides of sulphur & nitrogen and carbon dioxide in the atmosphere is called acid rain. Harmful effects of acid rain
1. It is toxic to vegetation and aquatic life
2. It damages building and states and dissolves heavy metals from soils, rocks and sediments. Taj Mahal has been damaged by acid rain.
3. The heavy metal ions such as copper, lead and aluminium, leached from the soil, enter well water and produced variety of toxic effects.
4. Acid rain also corrodes water pipes resulting in the leaching as heavy metals such as iron, lead and copper into drinking water.
