Basically there is proof that burning gas in a house causes problems with air quality as per this US consumer organisation quoting official research
” In May, a literature review by the think tank RMI highlighted EPA research that found homes with gas stoves have anywhere between 50 and 400 percent higher concentrations of nitrogen dioxide than homes without. Children are especially at risk, according to a study by UCLA Fielding School of Public Health commissioned by Sierra Club: Epidemiological research suggests that kids in homes with gas stoves are 42 percent more likely to have asthma than children in homes with electric stoves. Running a stove and oven for just 45 minutes can produce pollution levels that would be illegal outdoors.”
The article also reveals the dirty tricks the US gas industry uses to perpetuate it’s use.