Acid Rain
4 Minutes
Acid rain for kids: learn how polluted gases form nitric and sulfuric acids, their harmful effects, and prevention methods. An English science lesson.
- How factory and vehicle gases form nitric and sulfuric acid
- Damage caused to skin, houses, aquatic life, and plant growth
- A leaf experiment and prevention using CNG and smoke filters
What this lesson teaches
Acid rain is rainfall that contains nitric acid and sulfuric acid, which form when atmospheric water combines with air pollutants. It is produced when gases released by vehicles and industrial factories react with moisture high in the air.
How acid rain forms
The growing number of factories, rice mills, and motor vehicles has made daily life and travel easier, but their exhaust produces serious pollution. When these machines burn fuel, they release nitrogen dioxide and sulfur dioxide into the atmosphere. These chemical gases mix with the surrounding air and float high above as polluted air molecules. When water comes into contact with these floating pollutants, a chemical reaction turns the moisture into nitric acid and sulfuric acid, creating acid rain.
Harmful effects
- Coming into direct contact with acid rain creates painful irritation in human eyes and causes problems for our skin.
- The acidic rainwater attacks building materials and can corrode houses when it falls on them.
- When the rain runs into village ponds and lakes, it kills the fish, frogs, and other living creatures inside the water.
- Falling acid rain soaks into the soil, where it damages the ground and prevents seeds and plants from growing.
Testing acid damage on a leaf
An experiment shows how damaging the acids in polluted rain are to plant matter. One leaf is placed in a glass filled with plain water, and a second leaf is placed in a glass filled with nitric acid. When both glasses are checked after a full day, the leaf kept in the water remains just as it was, while the leaf submerged in nitric acid has completely dissolved.
Methods of prevention
- Reducing the waste produced by standard fuels like petrol and diesel, which are responsible for the most severe damage.
- Switching vehicles and industries to compressed natural gas, also known as CNG, including natural gases like methane and ethane.
- Installing machines known as electrostatic precipitators in factory exhaust systems to thoroughly filter smoke.
- Releasing only clean, filtered air from factories so that harmful sulfur and nitrogen gases do not enter the atmosphere.