Death while sleeping in closed room with burning coal furace is due to

Death while sleeping in closed room with burning coal furnace is due to

Death while sleeping in closed room with burning coal furnace is due to

It is not advised to sleep in a closed room with a coke fire buring inside on a cold day because of the harmful effects of

Why are we advised not to sleep in a room with a burning coal ingithi in it?

Why is it dangerous to sleep in a closed room with an open burning heating stove?