I can provide information based on i am not an expert. It is well known that gas stoves, especially older models, can release pollutants such as nitrogen dioxide and carbon monoxide, which can lead to poor indoor air quality. As for benzene, it is a volatile organic compound (VOC) that can be found in trace amounts in indoor air, and it is one of the byproducts of incomplete combustion of natural gas.
The levels of benzene and other pollutants can vary depending on factors like the stove's age, maintenance, ventilation in the kitchen, and the frequency and duration of cooking. Using a range hood or cooking in a well-ventilated area can help reduce the accumulation of pollutants. In more recent times, newer gas stove models have been designed with better combustion efficiency to lower emissions.
If you are concerned about indoor air quality or potential exposure to pollutants like benzene, it is advisable to have your home tested for air quality by a professional or use indoor air quality monitors to assess the situation. Additionally, regularly maintaining your gas stove and ensuring proper ventilation can help mitigate indoor air pollution concerns.