Question

Why do we feel suffocated in a house with closed doors and windows where coal is burning

Answer 1

we feel suffocated in a house with closed doors and windows where coal is burning because

as the coal burns it gets converted into carbon dioxide which is highly dangerous gas and the oxygen content in the room decreases we wont get enough oxygen to breath which results in suffocation

Answer 2

We feel suffocated in a house with closed doors and windows where coal is burning because, when when the coal is burning it its gets converted into Co2 cuz of which smoke or u can say Oxygen becomes less (amount of oxygen becomes low in house) and we don't get enough oxygen. So we feel suffocated in this kind of house.
And above that carbon dioxide is highly Dangerous as well so...!