Arch and lead–acid battery: what they have in common

1. Step 1. Arch — is made of — Brick. Arches were built of brick or stone.
2. Step 2. Brick — is material for — Chemical plant. The furnaces and towers are brick.
3. Step 3. Chemical plant — uses — Sulfuric acid. The first chemical plants produced sulfuric acid and soda.
4. Step 4. Sulfuric acid — is used in — Lead–acid battery. The electrolyte.

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