A new study is reporting a larger climate impact from gas stoves than previously thought, stoking a debate about one of the largest sources of greenhouse gas emissions: buildings.
Published by a team of four Stanford University Earth-system scientists today in the peer-reviewed journal Environmental Science & Technology, the study concluded that U.S. gas stoves could emit as much greenhouse gas annually as a half-million cars. That would come chiefly in the form of methane, a gas that is more potent than carbon dioxide over a two-decade period.
Once people used the stoves to cook, the associated indoor pollution—in the form of nitrogen dioxide—could quickly rise to unhealthy levels, they found. For kitchens with poor ventilation, the amount of NO2 could exceed what EPA prescribes as the exposure limit for outdoor air quality, according to the study.
Gas industry representatives immediately called the study flawed, biased and irrelevant for climate policy. “It is too bad that we aren’t trying to find out more important things about indoor air quality rather than pushing a political agenda centered around electrification,” he said. No state has ever banned gas for building use. Several dozen cities have done so but often carved out exemptions for gas stoves.
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