People usually keep Angethi/burning coal in their closed rooms during the winter season. Why is it advised to keep the door open?

A.VERIFIED ANSWERfact-checked by tutors

Burning of coal produces carbon monoxide, which is poisonous for the people inhaling it. If the door is closed, oxygen level will be less and carbon-monoxide level will be high. This is harmful for the person sleeping in the room. Hence the door should be closed.

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