Activated carbon and particle accelerator: what they have in common

1. Step 1. Activated carbon — is material for — Respirator. The filter is activated carbon.
2. Step 2. Respirator — is made of — Vulcanized rubber. The mask is rubber.
3. Step 3. Vulcanized rubber — is material for — Van de Graaff generator. The belt is rubber.
4. Step 4. Van de Graaff generator — evolved into — Particle accelerator. Early accelerators.

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