How do automobiles filled with catalytic converters reduce air pollution ? Suggest the best fuel for such vehicles.

Explanation

**Step-by-Step Solution:**

1. **Understanding Catalytic Converters:**
- Catalytic converters are devices installed in the exhaust systems of automobiles. Their primary function is to reduce harmful emissions from the vehicle's engine.

**Hint:** Remember that catalytic converters are essential for transforming harmful gases into less harmful substances.

2. **Function of Catalytic Converters:**
...