What are the two classes of natural resources?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Natural Resources:**
- Natural resources are materials or substances that occur in nature and can be used for economic gain. They are essential for human survival and development. Examples include air, water, soil, minerals, and forests.

2. **Classification of Natural Resources:**
- Natural resources can be classified into two main categories:
- **Inexhaustible Natural Resources**
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