Lime and nuclear reactor: what they have in common

1. Step 1. Lime — is material for — Roman concrete. The binder is lime.
2. Step 2. Roman concrete — evolved into — Concrete. A revival of Roman technology.
3. Step 3. Concrete — is material for — Nuclear power plant. The containment is concrete.
4. Step 4. Nuclear power plant — has part — Nuclear reactor. The reactor heats the coolant.

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