Implosion explosive lens and sewage treatment plant: what they have in common

1. Step 1. Implosion explosive lens — is part of — Nuclear weapon. It compresses the core with an explosion.
2. Step 2. Nuclear weapon — works like — Nuclear reactor. The same physics: a controlled and an uncontrolled chain reaction.
3. Step 3. Nuclear reactor — is part of — Nuclear power plant. The reactor heats the coolant.
4. Step 4. Nuclear power plant — is made of — Concrete. The containment is concrete.
5. Step 5. Concrete — is material for — Sewage treatment plant. The tanks are concrete.

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