Nuclear fusion and gas lamp: what they have in common

1. Step 1. Nuclear fusion — uses — Plasma. Fusion takes place in hot plasma.
2. Step 2. Plasma — uses — Electric arc. An arc is an example of plasma.
3. Step 3. Electric arc — is used in — Arc lamp. An arc.
4. Step 4. Arc lamp — is part of — Street light. The first electric street lights were arc lamps (the “Yablochkov candle”, 1878).
5. Step 5. Street light — evolved from — Gas lamp. Gas lamps.

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