Coal is a potential source for ammonia. Comment.

Explanation

To understand how coal can be a potential source of ammonia, we can break down the process into several steps:

### Step-by-Step Solution:

1. **Destructive Distillation of Coal**:
- The first step involves the destructive distillation of coal. This process involves heating coal in the absence of air, which leads to the breakdown of coal into various products.
- **Hint**: Remember that destructive distillation is a thermal decomposition process that occurs without oxygen.

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