The study has multiple parts. The part of the study I quoted is not specific to nitrogen dioxide, but a general conclusion about the combined effects of all of

The study has multiple parts. The part of the study I quoted is not specific to nitrogen dioxide, but a general conclusion about the combined effects of all of the properties of gas stoves. The study does not have enough information to conclude that the effect is entirely or even mostly caused by nitrogen dioxide in particular, or any other single cause. I did not claim that particulates are the cause. The point is that gas stove combustion products are harmful to children and probably everyone.