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How can a device warm food without using fire or electricity?
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How can a device warm food without using fire or electricity?

User Akash Kava
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1 Answer

2 votes

Answer:

"Canned Heat. These are flaming canisters that are often used by caterers to keep food warm."

or solar channeling (like with a magnifying glass and the sun)

User Vasiliki Siakka
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