Name two metals used in a catalytic converter. How do they help in keeping the environment clean ?

Explanation

**Step-by-Step Solution:**

1. **Identify the Metals Used in Catalytic Converters:**
The two primary metals used in catalytic converters are **platinum (Pt)** and **palladium (Pd)**. These metals are classified as precious metals and serve as catalysts in the conversion process.

2. **Understand the Role of Catalysts:**
Catalysts are substances that speed up chemical reactions without being consumed in the process. In catalytic converters, platinum and palladium facilitate the conversion of harmful gases into less harmful substances.

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