Question

how do we know that food is spoiled​

Answer 1

Explanation:

Swelling indicates that the food inside has spoiled. ... If the food inside looks moldy, or cloudy when it should be clear, toss it. If you notice an unpleasant odor or gassiness inside the can or jar, dispose of it. Canned food that is spoiled may contain bacteria that can cause botulism, which could be fatal.

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Answer 2

Answer:

The bad smell come out from the food, bacteria and fungus are all around there.