People usually keep angithi/burning


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


When coal burns in air, it produces carboh dioxide which is non-poisonous. But, when angithi or coal burns in a closed room, the air or oxygen

cannot enter the room.

So, in the incomplete supply of oxygen, coal burns to produce carbon monoxide which is highly poisonous gas. It causes suffocation in a closed

room. So, door and windows should be open.

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