Households using gas hobs are being warned about significant health risks, particularly during the July heatwave when windows are often kept closed to keep out the heat. According to Clean Air Hub UK, cooking with gas releases air pollutants that harm human health and the environment.
Health Risks from Gas Cooking
Gas cookers are a major source of indoor air pollution, primarily nitrogen dioxide (NO2). The Clean Air Hub states: "Gas use in a typical kitchen can produce indoor nitrogen dioxide pollution that exceeds World Health Organisation air quality guidelines, UK Health and Safety Executive limits for indoor air pollution, and the legal UK outdoor air pollution standards."
Exposure to nitrogen dioxide can cause inflammation of the airways, reduced lung function, and increased asthma attacks. The hub warns: "Gas cooking is linked to asthma in children and adults, decrements in pulmonary function, respiratory illness in adults, as well as dementia and cognitive decline in adults."
Pollutants and Long-Term Effects
Gas hobs can produce carbon monoxide, carbon dioxide, and nitrogen dioxide, which linger in the home. Even when not in use, gas appliances can leak methane and benzene, a known human carcinogen. Research suggests that the impact of gas cooking on childhood asthma is comparable to that of second-hand smoke. Additionally, exposure during the first three months of life has been linked to impaired memory and verbal development, and a higher risk of ADHD symptoms in toddlers.
Safety Measures for Gas Hob Users
To reduce risks, the Clean Air Hub recommends proper ventilation: "Properly ventilate your kitchen when cooking, preferably with a functioning range hood vented to the outside, by mechanical ventilation, or by opening windows." It advises using ventilation during cooking and for at least 10 minutes after, opening windows to create a through-draught. Other tips include switching to electric appliances, servicing gas appliances annually, installing carbon monoxide detectors, and using plug-in appliances like electric kettles, microwaves, rice cookers, or air fryers to minimise exposure.
