Chloroform and electric fan: what they have in common

1. Step 1. Chloroform — is made of — Chlorine. An organochlorine compound.
2. Step 2. Chlorine — is used in — Water chlorination. Chlorine.
3. Step 3. Water chlorination — is used in — Water treatment plant. Chlorination.
4. Step 4. Water treatment plant — has part — Centrifugal pump. Pumping stations.
5. Step 5. Centrifugal pump — has part — Impeller. The impeller accelerates the liquid.
6. Step 6. Impeller — is part of — Electric fan. A fan's blades are an impeller that pushes the air.

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