Question

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

Answer 1

Explanation:

Because the burning releases CO2 gas.

if we close doors, there will be only some O2 inside and when we breathe O2, we release Co2. So after some time, all the O2 in room will complete and only CO2 will remain. Bt this happens faster because there is also CO2 coming from burning coal. If this happens, we can't respire and we will die.

Hence it is advised to keep the doors open