Steel works and electrical grid: what they have in common

1. Step 1. Steel works — uses — Coke. The steel works’ blast furnaces run on coke.
2. Step 2. Coke — is made of — Coal. Coke is baked coal.
3. Step 3. Coal — is used in — Power station. The first stations ran on coal.
4. Step 4. Power station — is part of — Electrical grid. Power stations feed the grid.

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