Healthy cooking, away from oil smoke Animal experiments have shown that oil mist condensates produced when canola oil and soybean oil are heated to 270°C to 280°C can cause cellular chromosome damage, which is thought to be related to cancer development. There is no such damage in unheated oils, and the damage is weaker when heated to less than 240°C. Therefore, cooking oil heated at too high a temperature, especially when heated and smoked can produce a large number of harmful carcinogenic substances, especially when fried food, full of kitchen is grease smoke, which is very harmful to the body. Repeatedly heated cooking oil, such as those used to fry food several times, not only contains carcinogenic substances (so you should eat less fried food), but also contains more carcinogens in the fumes produced by it, which is even more harmful. Clinical analysis found that lung cancer patients, in addition to a greater relationship with smoking, also have a direct relationship with the frequent smelling of oil smoke generated by high oil temperature, most of these patients are over 50 years old and have a long history of cooking. Household Energy: The Forgotten 3 Billion Approximately 3 billion people still cook and heat their homes using solid fuels (firewood, crop waste, charcoal, coal and animal dung) over open fires and open stoves. Most are poor and live in low- and middle-income countries. Such inefficient cooking fuels and techniques cause high levels of indoor air pollution, producing large amounts of pollutants harmful to health, including tiny soot particles that can penetrate deep into the lungs. In poorly ventilated dwellings, indoor smoke can be up to 100 times higher than the acceptable level of microscopic particles. Women and young children spend the most time at the fireside and are exposed to particularly high levels of pollution. Each year, 4.3 million people die prematurely from diseases caused by indoor air pollution from the inefficient use of solid fuels (2012 data). Of those who die: 6% die from lung cancer. In China, indoor combustion of solid fuels is a significant factor in the incidence of some chronic lung diseases among rural women. This is closely related to the chronic use of solid fuels in rural areas along with inadequate indoor ventilation. Although, whether it is firewood, gas or natural gas, the harmful substances such as nitric oxide released during the combustion of these fuels can increase the chances of chronic lung diseases and even malignant tumors such as lung cancer and nasopharyngeal cancer, the use of gas and natural gas and other gaseous fuels and improved ventilation can reduce pollution in the small kitchen environment.