That's what the smoke detectors are for. They are mandatory where I live.

Fire likes oxygen. As it turns out, so do lungs.

But that is why here in Belgium it is mandated that doors have a minimum gap for ventilation while also keeping the door closed and also outside ventilation

My window faces a busy road. Air quality is definitely way better with the window closed.

why not both? both is good.

Yeah, getting a good air quality monitor has made me understand the value of open windows. The co2 levels are so much higher with the windows closed

I don't live in a climate that supports that. My cat can come and go as she pleases. My other cat won't come in at night because it's not his territory.

Experts: open their cage door too and this problem will resolve itself

Omg, the mocking birds here are insane. I wake up early naturally, but those motherfuckers are SO LOUD they wake me up even earlier.