Mineral fertilizer and transformer: what they have in common

1. Step 1. Mineral fertilizer — uses — Sulfuric acid. Superphosphate is made with sulfuric acid.
2. Step 2. Sulfuric acid — is used in — Lead–acid battery. The electrolyte.
3. Step 3. Lead–acid battery — is part of — Uninterruptible power supply. A battery.
4. Step 4. Uninterruptible power supply — is part of — Data centre. Backup power.
5. Step 5. Data centre — uses — Electrical grid. Power.
6. Step 6. Electrical grid — has part — Transformer. Transformer substations.

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