The most serious pollutant to rubber tyres is

Options

A. `CO_(2)`
B. `CO`
C. `O_(3)`
D. `NO_(2)`

Answer

To solve the question regarding the most serious pollutant to rubber tyres, we can follow these steps:

### Step 1: Identify the Options
The options provided are:
- Carbon Dioxide (CO2)
- Carbon Monoxide (CO)
- Ozone (O3)
- Nitrogen Dioxide (NO2)

### Step 2: Analyze Each Option
- **Carbon Dioxide (CO2)**: This is a greenhouse gas primarily associated with climate change but does not directly harm rubber tyres.

- **Carbon Monoxide (CO)**: This gas is a product of incomplete combustion and is harmful to health, but it does not significantly affect rubber tyres.

- **Ozone (O3)**: Ozone at ground level is a harmful pollutant. It is formed from the reaction of sunlight with pollutants like volatile organic compounds (VOCs) and nitrogen oxides. Ozone is known to degrade rubber materials, making it a serious pollutant for rubber tyres.

- **Nitrogen Dioxide (NO2)**: This gas contributes to air pollution and respiratory problems but is not directly linked to the degradation of rubber tyres.

### Step 3: Determine the Most Serious Pollutant
After analyzing the options, it is clear that:
- **Ozone (O3)** is the most serious pollutant to rubber tyres as it can cause significant deterioration and damage.

### Conclusion
The correct answer to the question is **Ozone (O3)**.

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