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The kitchen is a space where many housewives spend a significant amount of time every day. However, the lingering smell of cooking smoke can make this area less appealing. Studies have shown that the air quality inside kitchens is often far worse than outdoor air, making it one of the most common sources of indoor pollution and a hidden health risk.
Researchers from the University of Sheffield in the UK conducted a four-week study on indoor air quality, collecting samples from both inside and outside kitchens. They found that when gas is used for cooking, the level of nitrogen dioxide in the kitchen can be three times higher than outside, exceeding recommended indoor air quality standards. Similarly, the concentration of fine particulate matter—tiny particles that can be inhaled into the lungs—is also higher indoors. As researcher Vida Sharifi explained, “People usually focus on outdoor air quality, but we spend 90% of our time indoors, yet rarely consider if the air inside is polluted.†Gas, liquefied petroleum gas, and other fuels release harmful gases like carbon monoxide, carbon dioxide, and nitrogen oxides, contributing to indoor air pollution.
In addition to fuel-based emissions, daily cooking habits significantly impact air quality. In China, many people cook with a lot of oil and use high heat, which causes oils and ingredients to release harmful substances. These fumes can irritate the nose, eyes, and throat, leading to conditions like rhinitis, pharyngitis, and bronchitis. Prolonged exposure may increase the risk of asthma and even lung cancer. Moreover, the oily residue that settles on the skin can interfere with its natural breathing, causing dryness, wrinkles, and a dull complexion over time.
To improve kitchen air quality and reduce health risks, consider these practical steps:
1. Use less oil and cook at medium temperatures. Most refined oils have smoke points around 200°C, while traditional cooking methods often exceed this. Try to minimize oil usage, rely on the natural fat of ingredients, and add only a small amount to vegetables. Cooking at lower temperatures helps preserve nutrients and flavor. Also, avoid using too little oil, as this can lead to more smoke and pollution. Consider using non-stick pans or appliances like induction cookers and microwaves, and opt for cooking methods like steaming or stewing that produce less smoke.
2. Avoid reusing cooking oil. Choose high-quality oils with fewer impurities to reduce the risk of toxic compounds forming during cooking.
3. Ensure proper ventilation. Always use a range hood or a vented pot while cooking, and after finishing, open windows for at least 10 minutes to allow fresh air to circulate.
4. Use efficient cooking appliances. Poorly ventilated gas stoves can lead to incomplete combustion, releasing dangerous pollutants equivalent to smoking two packs of cigarettes a day. This increases the risk of lung cancer, pneumonia, and other respiratory issues.
The kitchen is a vital part of daily life, and maintaining good air quality is essential for health. By taking simple steps to reduce pollution, you can protect yourself and your family from long-term health problems.