Dry cleaning and voltaic pile: what they have in common

1. Step 1. Dry cleaning — uses — Chemical reaction. Solvents.
2. Step 2. Chemical reaction — includes — Electrolysis. Electrolysis is a chemical reaction driven by an electric current.
3. Step 3. Electrolysis — evolved from — Voltaic pile. The first electrolysis of water was powered by a voltaic pile.

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