According to the Global Times, a British study recently reported that cooking on cookware with poor ventilation systems and very low combustion efficiency can cause health damage equivalent to smoking two packs of cigarettes a day, a condition that kills 1.6 million people worldwide each year. This report also states that kitchen fumes can cause lung cancer, pneumonia and other lower respiratory diseases. Other diseases that may be caused include asthma and even cataracts. The main hazards of kitchen fumes are the following: First, kitchen fumes can invade the human respiratory tract with the air, which can cause loss of appetite, heartburn, mental fatigue, drowsiness, fatigue and other symptoms, medically known as the fumes syndrome. Second, kitchen fumes can harm the human sensory organs. Third, kitchen fumes contain a carcinogen called benzopyrene, benzopyrene can lead to damage to human cell chromosomes, long-term inhalation can induce lung tissue carcinogenesis. What oil smoke less In our market vegetable oil, according to its quality, there are four grades: “secondary oil”, “primary oil”, advanced cooking oil and salad oil. ”Secondary oil” is the “primary product” of vegetable oil, which contains many impurities and is very easy to smoke, and has been eliminated in developed countries. ”Advanced cooking oil” is the processed product of “first grade oil”, which is light yellow, transparent and bright, contains less impurities and does not smoke. ”First grade oil” is the product of “second grade oil” after processing. It is yellow, clear and transparent, with less impurity content, but still easy to smoke. Most of the bulk oil sold in the city is “first grade oil”. ”Salad oil” is “cold oil”, which is characterized by its light color like water, almost no impurities, no oil smoke and fishy smell, it is refined through very strict procedures such as high-temperature high-altitude distillation and deodorization, and is known as “edible oil of Fine”. Besides being used for cold dishes, salad oil is also an ideal vegetable oil for frying, deep-frying and stir-frying. However, salad oil is not perfect, as it has a short shelf life at room temperature and can easily become tasteless or even spoiled after a long time. So consumers should buy now and eat now, not a lot of long-term storage. Away from the hazards of fumes there are ways 1, must do a good job of ventilation in the kitchen, in the cooking process, always open the hood, if there is no hood in the kitchen must also open the window ventilation, so that fumes as soon as possible to dissipate. At least 10 minutes after the end of cooking to extend the exhaust. 2, change cooking habits, do not make the oil temperature too hot, frying oil temperature as far as possible not to exceed 200 ℃ (to the limit of the frying pan smoke), so that not only can reduce the “fumes syndrome”, from a nutritional point of view, the vitamins in the pot dishes are also effectively preserved. It is best not to use oil that has been repeatedly fried, and when choosing cooking oil, you should buy products with guaranteed quality to avoid the production of more harmful substances during the heating process of poor quality cooking oil. In urban neighborhoods where residents are concentrated, be sure to unclog the fume exhaust pipes and not to use the method of direct discharge from the window. In this way, although the kitchen fumes of their own homes were excluded to the outdoors at that time, the consequences caused are more serious. Because the original building flue is the fumes sucked to the top of the building, in the role of wind and air pressure will be quickly distributed, will not cause a major health hazard. However, if the window discharge method is adopted, on the one hand, a large amount of harmful gases and fumes will be trapped in the air between the buildings, polluting the outdoor air of the community. On the other hand, part of the harmful gases will be backed up with the airflow and wind from the window to the neighbors and their own indoor, resulting in indoor air pollution. 3, it is recommended to use more microwave ovens, electric stoves, electric rice cookers, electric ovens and other kitchen appliances, which can greatly reduce air pollution in the kitchen.