Which air pollutant is not released by scooters and cars?

Options

A. `SO_(2)`
B. Fly ash
C. Hydrocarbons
D. CO

Answer

To determine which air pollutant is not released by scooters and cars, we can follow these steps:

### Step 1: Identify Common Air Pollutants from Vehicles
First, we need to understand what pollutants are typically emitted by scooters and cars. Common pollutants from these vehicles include:
- Carbon monoxide (CO)
- Nitrogen oxides (NOx)
- Sulfur oxides (SOx)
- Unburnt hydrocarbons

### Step 2: Analyze the Options
Next, we need to analyze the options provided in the question. Let's assume the options are:
1. Carbon monoxide (CO)
2. Nitrogen oxides (NOx)
3. Sulfur oxides (SOx)
4. Fly ash

### Step 3: Compare Each Option
Now, we compare each option to see if it is released by scooters and cars:
- **Carbon monoxide (CO)**: Released by the combustion of gasoline in vehicles.
- **Nitrogen oxides (NOx)**: Also produced during the combustion process in engines.
- **Sulfur oxides (SOx)**: Emitted from the burning of fuels that contain sulfur, which can occur in vehicles.
- **Fly ash**: This is primarily produced from the burning of coal in thermal power plants and is not emitted by scooters and cars.

### Step 4: Conclusion
From our analysis, we conclude that the air pollutant that is not released by scooters and cars is **fly ash**.

### Final Answer
The air pollutant that is not released by scooters and cars is **fly ash**.

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