Cooking with a gas stove can release pollutants into the air that may pose health risks, but experts emphasize that proper ventilation can mitigate these dangers. The issue gained prominence in 2023 when New York became the first state to ban natural gas stoves in new buildings.
Darin Detwiler, a food safety expert and professor at Northeastern University, explained that gas stoves create indoor air pollutants through two main mechanisms. High-temperature reactions can produce nitrogen oxides, which are lung irritants. Additionally, incomplete combustion of the natural gas fuel can release pollutants such as carbon monoxide, fine particulates, and formaldehyde. Even simple actions like boiling water on a gas stove can release these substances, along with small amounts of unburned methane.
"The important distinction is that these pollutants don’t necessarily come from the food being cooked. They can come from the fuel itself," Detwiler told HuffPost. "In other words, it’s not what’s in the pot that’s polluting the air; it’s what’s coming from underneath it."
Dr. Alexander Rabin, a pulmonary care doctor at the University of Michigan Medical School, noted that a 2023 scientific article published in the American Journal of Respiratory and Critical Care Medicine confirmed that gas stoves release pollutants, primarily nitrogen dioxide. The study also indicated that proper ventilation, such as opening a window, can substantially reduce exposure.
Nitrogen dioxide can irritate the airways, potentially exacerbating symptoms for individuals with asthma, such as wheezing, coughing, and shortness of breath. Rabin noted particular concern for children, whose lungs are still developing, as well as for those with chronic lung conditions like COPD.
Dr. Gustavo Ferrer, a pulmonologist, added that carbon monoxide is another dangerous pollutant released by gas stoves. Carbon monoxide interferes with the blood's ability to carry oxygen, and significant exposure can lead to headaches, dizziness, nausea, confusion, and in severe cases, life-threatening poisoning.
To ensure a safer kitchen environment, experts recommend several ventilation strategies. Using an overhead range hood that vents directly outdoors is the most effective method. It is advised to turn on the vent before cooking begins, keep it running throughout the cooking process, and continue using it for several minutes after the burners are turned off. This helps capture pollutants at their source before they disperse into the home.
Opening a window can also help by increasing airflow and diluting accumulated pollutants, although this may be less effective if outdoor air quality is poor. In such cases, relying on the exhaust fan becomes even more crucial.
Experts also suggest using the back burners of the stove more often than the front ones, as overhead vents tend to cover the back burners more effectively. A lab study supports this recommendation, showing that higher exhaust fan settings provide better pollutant removal.
It is also important to ensure the stove is not leaking gas when the burners are off and to have a carbon monoxide detector installed. Using a gas stove for home heating is strongly discouraged due to the risk of dangerous carbon monoxide exposure.
"Indoor air quality is an important part of respiratory health, yet it is often overlooked," Ferrer said. "We spend much of our lives indoors, and our homes should be places where we reduce exposure to harmful pollutants, not unknowingly increase it."
Ultimately, experts stress that while gas stoves do release pollutants, they can be used safely with proper ventilation. "A safe kitchen isn’t just about how we handle food. It’s also about the equipment we use and the environment in which we prepare meals," Detwiler concluded.