There's been some research finding that the gas stove can actually pollute even when it's turned off. methane leaks are really common whenever you have pipes because it finds a way to leak out. A study out in California found that methane was actually coming from people's stoves even when they were turned off. If you're talking about tight cramps, spaces that don't have any ventilation, then you're probably breathing a lot more of that NO2 coming off that stove.