Mention three areas in which `H_2SO_4` plays an important role.

Explanation

To answer the question regarding the important roles of H₂SO₄ (sulfuric acid), we can outline three key areas where it plays a significant role:

### Step-by-Step Solution:

1. **Manufacture of Fertilizers**:
- H₂SO₄ is extensively used in the production of fertilizers, particularly ammonium sulfate. This is crucial for enhancing soil fertility and promoting plant growth.

2. **Storage Batteries**:
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