Brine-soaked cloth discs and fuel cell: what they have in common

1. Step 1. Brine-soaked cloth discs — is part of — Voltaic pile. Cloth soaked in brine.
2. Step 2. Voltaic pile — uses — Electrochemical reaction. Current arises from the reaction of dissimilar metals with an electrolyte.
3. Step 3. Electrochemical reaction — is used in — Fuel cell. The reaction runs electrochemically, without combustion.

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