Gas stoves pollute restaurant air, harm diners and staff

A recent study in the United States has highlighted significant air quality issues in commercial kitchens that utilize gas-powered appliances. Researchers discovered that nitrogen dioxide levels in 17 out of 27 kitchens, all of which used fossil gas or propane, surpassed World Health Organization guidelines for indoor air. These levels were found to affect not only the catering staff working for extended hours but also the diners in the adjacent dining areas.

Interestingly, the study observed that air pollution was not contained within the kitchen space. Dining areas in these establishments recorded median concentrations of pollutants greater than WHO outdoor air quality guidelines. An unexpected finding was that pollution levels remained elevated overnight and in the early morning, even when cooking appliances were off. This persistent pollution was attributed to the 24/7 operation of pilot lights on gas stoves and other commercial-grade cooking equipment, which are not subject to the same energy efficiency regulations as residential appliances.

In contrast, kitchens that operated entirely on electric power demonstrated significantly lower air pollution levels and cooler temperatures, offering benefits for both staff welfare and environmental impact. The findings suggest a potential health risk for millions working in and dining at restaurants that rely on gas cooking, with ongoing exposure to pollutants like nitrogen dioxide.