Smoking and telephone: what they have in common

1. Step 1. Smoking — uses — Combustion. The smoke of smouldering wood.
2. Step 2. Combustion — is a kind of — Oxidation. Combustion is rapid oxidation.
3. Step 3. Oxidation — is used in — Electrochemical reaction. Redox reactions.
4. Step 4. Electrochemical reaction — is used in — Fax. The paper darkened under current.
5. Step 5. Fax — uses — Telephone. Transmission over a telephone line.

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