Explain the working principle of scrubber.

Explanation

### Step-by-Step Solution:

1. **Definition of a Scrubber**: A scrubber is a device used to remove pollutants from industrial exhaust gases. It is commonly used to clean the air by removing harmful substances.

**Hint**: Think of a scrubber as a filter that cleans the air we breathe.

2. **Function of a Scrubber**: The primary function of a scrubber is to remove acidic gases, particularly sulfur oxides (SOx) and nitrogen oxides (NOx), from the exhaust gases produced during industrial processes.

...