No? Really? You don't think gas and its combustion byproducts can ever be bad for you?

What are the known health effects from NO2 exposure?

In a 1992 meta-analysis of studies on this topic, scientists at the EPA and Duke University found that nitrogen dioxide exposure that is comparable to that from a gas stove increases the odds of children developing a respiratory illness by about 20 percent.

(...)

In addition to acute effects such as asthma symptoms, long-term nitrogen dioxide exposure has also been linked to chronic lung disease and increased mortality in general.

https://www.scientificamerican.com/article/the-health-risks-of-gas-stoves-explained/