I'll answer a question in the comments:
I will be curious to know what is the average amount of Co2 produced by a stove vs the average amount of co2 generated by human breathing. My guess would be that stove will win but I heard of people suffocate in closed cars while sleeping
To make things simple, lets assume assume your body burns 2,600 calories (~11 MJ) per day, and burns purely glucose.
At 3.75 calories (9.83 kJ) per gram, you'll be burning around 690 grams of glucose per day, or a little under 24 oz (710 mL) per day.
40% of that glucose is carbon, so the 9.60 oz (280 mL) per day of carbon in glucose yields about 35 oz (1 L) of CO2 per day, a little over 2 pounds (0.9 kg). About 1.5 oz (44 mL) of CO2 per hour.
This value is close enough to what wikipedia has, so we can assume 1.5 oz (44 mL) of CO2 per hour to be correct.
A typical canister stove has an 80/20 mix of isobutane and propane. If we look at the 8.3 oz (250 mL) MSR ISOPRO canister with a superfly stove, that will give us a burn time of about 60 minutes.
That 8.3 oz (250 mL) MSR stove is mostly carbon by mass, with 6.8 oz (200 mL) of carbon, which when burned will produce about 25 oz (740 mL) of CO2.
So, sitting in your tent, you'll be producing 1.5 oz (44 mL) of CO2 per hr, while your stove will be pumping out 25 oz (740 mL) per hr, 16 times as much.
In the course of an hour, that CO2 would occupy about a half cubic meter, which in a tent can easily raise the CO2 concentration well above toxic levels.