Galvanization and solar panel: what they have in common

1. Step 1. Galvanization — is made of — Zinc. A zinc coating.
2. Step 2. Zinc — is material for — Alkaline battery. The anode is zinc.
3. Step 3. Alkaline battery — is part of — Electronic calculator. A calculator runs on a battery, sometimes on a tiny solar panel.
4. Step 4. Electronic calculator — has part — Solar panel. Many run on a solar cell.

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