(Environmental Science & Technology )This study found that gas stoves emit 0.8-1.3% of the gas they use as unburned methane, resulting in a total of 28.1 gigagrams of methane emissions per year. This has a climate impact equivalent to the annual carbon dioxide emissions from 500,000 cars.
The study also found that more than 75% of methane emissions came from the stove being off and not in use. Without proper ventilation, families can surpass the 1-hour national standard of NO2 (100 ppb) within a few minutes of stove usage, especially in smaller kitchens.
Lebel, E., Finnegan, C., Ouyang, Z., Jackson, R., (2022) Methane and NOx Emissions from Natural Gas Stoves, Cooktops, and Ovens in Residential Homes. Environmental Science & Technology 56 (4), 2529-2539. https://pubs.acs.org/doi/10.1021/acs.est.1c04707