A new US medical study suggests that gas stoves may worsen asthma symptoms and lower indoor air quality. Researchers found that replacing gas stoves with electric stoves improved both air quality and overall respiratory health.
The study was carried out by researchers at Case Western Reserve University. It included 85 adults and children living with severe asthma. The goal was to understand how cooking appliances affect indoor air and asthma symptoms.
Researchers first monitored participants for four weeks while they continued using gas stoves in their homes. After that, each household received a free electric stove. The participants then used the new stoves for another two to three months.
The research team measured indoor air quality before and after the switch. They focused on nitrogen dioxide, a harmful gas produced when natural gas burns. They also tracked changes in asthma symptoms and healthcare visits during the study.
According to the researchers, gas stoves release nitrogen dioxide and carbon monoxide while cooking. Long-term exposure to these gases may affect the lungs and make breathing problems worse. People with asthma may be more sensitive to these indoor pollutants.
The study found that replacing gas stoves with electric stoves reduced indoor nitrogen dioxide levels by as much as 70 percent. This marked improvement showed that changing cooking appliances can have a major impact on indoor air quality.
Researchers also observed clear health benefits after the switch. Many participants reported fewer asthma symptoms during the follow-up period. In some cases, the improvement was equal to or greater than the benefits normally seen with asthma medication.
The study also showed positive changes in daily life. Sick leave from work or school dropped by 80 percent after households switched to electric stoves. Doctor visits related to asthma also decreased by 70 percent during the study period.
Researchers believe these findings highlight the importance of reducing indoor air pollution. Better indoor air may help people with asthma manage their symptoms more effectively. However, they stressed that this study does not prove that gas stoves directly cause asthma. Instead, it shows a strong link between cooking emissions and worsening symptoms.
The researchers also pointed out the study’s limitations. Only 85 participants took part, and the research lasted for just a few months. They said larger studies over a longer period are needed to confirm the results.
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Even with these limitations, the findings add to growing evidence about indoor air pollution and respiratory health. The researchers hope future studies will provide more information on the long-term effects of gas stoves and the potential benefits of switching to electric alternatives.
