Which among the following processes does not add suspended particulate matter to air ?

Options

A. Usage of air conditioners
B. Burning of Fuels
C. Paper Industry
D. Combustion of coal

Answer

To solve the question "Which among the following processes does not add suspended particulate matter to air?", we will analyze the options provided and identify the process that does not contribute to the addition of suspended particulate matter.

### Step-by-Step Solution:

1. **Understand Suspended Particulate Matter (SPM)**:
- Suspended particulate matter includes tiny particles like dust, ash, smoke, and fumes that can be found in the air. These particles can come from various sources, including industrial processes, combustion of fuels, and agricultural activities.

2. **Identify the Processes**:
- We need to evaluate the processes listed in the options. Common sources of suspended particulate matter include:
- Combustion of fuels (e.g., coal, gasoline)
- Industrial processes (e.g., manufacturing, mining)
- Agricultural activities (e.g., plowing, burning of crop residues)

3. **Evaluate Each Option**:
- **Option A**: Combustion of fuels - This process releases smoke and ash, contributing to SPM.
- **Option B**: Industrial processes - These often release various particulates into the air.
- **Option C**: Agricultural processes - These can also release dust and smoke into the atmosphere.
- **Option D**: Use of air conditioners - Air conditioners do not release particulates into the air; they primarily cool the air and can filter some particles.

4. **Conclusion**:
- Among the options, the use of air conditioners is the only process that does not add suspended particulate matter to the air. Therefore, the correct answer is the use of air conditioners.

### Final Answer:
The process that does not add suspended particulate matter to the air is the **use of air conditioners**.