- The rain which contains acid is known as acid rain. Acid rain also occurs in snow, fog, and in dust form.
- Acid Rain generally has a pH of 4.2 – 4.6.
Causes of Acid Rain
- Burning of fossil fuels.
- Exhaust from automobiles.
- Volcanic eruption.
- Burning of coal.
- Manufacturing, oil refineries and other industrial waste.
- Power plants release harmful gases.
- All these activities release oxides of sulphur, carbon and nitrogen which is the main cause of acid rain.
Effects of Acid Rain
- Acid rain pollutes aquatic environment which leads to the death of many marine organisms.
- Acid rain leaches nutrients from the soil like aluminium, magnesium, etc.
- It decreases the fertility of the soil by decreasing nitrate level.
- Discolouration and foliage of leaves.
- Withering and shrinking of leaves.
- It kills many useful bacterias which are useful for the environment.
- It causes skin diseases in human beings.
- It causes irritation in the eyes.
- Sometimes it leads to the inflammation of the respiratory tract.
- It damages the buildings and monuments made up of stones and metals.
Prevention of Acid Rain
- Uses clean sources of energy such as CNG instead of petroleum and diesel.
- Remove sulphur dioxide from flue gas.
- Remove oxides of sulphur and oxides of nitrogen before releasing.
- Use public transport to lessen the exhaust from automobiles.
- Use LPG for cooking purposes instead of a gas fire.
- Use higher chimneys to reduce the exhaust of harmful gases.
Examples of Acid Rain
- Statue of Liberty which is made of copper which has been destroyed by culminating action of acid rain and oxidation for 30 years, therefore it is becoming green in colour.
- Taj Mahal is one of the 7 wonders of the world which are made up of white marble. It has turned yellow in colour due to acid rain.