Excessive heavy metals are a serious environmental problem, and it has caused great harm to humans and ecosystems. Heavy metals refer to densities greater than 45 grams of cubic centimeters of metallic elements, including lead, mercury, cadmium, chromium, etc.
These elements do not cause harm to the environment and organisms in their natural state, but when they are discharged into the environment, they cause harm to the environment and organisms.
Excessive heavy metals mainly come from emissions from industrial production, mining, smelting, chemical industry and other fields. These sources can release heavy metals into the atmosphere, water and soil, resulting in excessive levels of heavy metals in the environment.
CCTV once reported a shocking news: in an ironworks in Jiangxi, chemical iron drums were arbitrarily discarded, and the pungent smell filled the air. What is shocking is that the workers actually processed these iron buckets into a bright-looking iron pot. These iron pots are soaked in sulfuric acid and hydrochloric acid, polished, oiled and other processes, and finally enter the market, which is popular because of their low price. However, consumers are unaware that the iron pot in their hands is actually a "poisonous iron pot". Stir-frying in this poisonous iron pot will not only fail to cook a delicious dish, but will turn the delicacy into poison. Although the state has been cracking down hard for many years, the poisonous iron pot is still repeatedly banned. This incident not only exposed the ugly face of some companies that are mercenary and ignore environmental protection and consumer health, but also triggered people's deep thinking about food safety and environmental protection. We call on relevant departments to strengthen supervision and resolutely curb the production and sale of substandard products such as poisonous iron pots. At the same time, consumers should also be vigilant, pay attention to food safety issues, and effectively protect their rights and interests. Only in this way can we work together to create a safe, healthy and green living environment. 
A poisoned iron pot, as the name suggests, is a type of iron pot that contains toxins. This iron pan uses inferior materials in the production process, resulting in the release of harmful substances on its surface, which can contaminate the food during use and cause harm to human health.
The reason why the poisoned iron pot can turn stir-fry into "poison" is that when cooking at high temperatures, the harmful substances on the surface of the iron pot will react with the moisture and oxygen in the food, releasing harmful gases and heavy metal ions. These harmful substances can penetrate into the food and contaminate the food and endanger human health.
Specifically, the harmful substances in the poisoned iron pot include heavy metal ions such as lead, arsenic, mercury and harmful gases such as polycyclic aromatic hydrocarbons and formaldehyde. After these substances accumulate in the human body to a certain amount, they will cause varying degrees of damage to the nervous system, digestive system, respiratory system and **. Especially for people such as children, pregnant women and the elderly, the harm is even more serious.
Therefore, when we buy iron pots, we should pay attention to choosing brands and manufacturers with reliable quality, and avoid buying and using toxic iron pots. At the same time, when using iron pots, it is also necessary to pay attention to controlling the cooking temperature and time, and avoid heating food at high temperatures for a long time to reduce the release of harmful substances.
In conclusion, the poisoned iron pot is a very dangerous kitchen utensil, we should avoid using the poisoned iron pot at the source and take effective measures to protect our health.
First of all, we need to look at the material of the pot. A good iron pot should be made of pure iron without any chemical coating. Therefore, you can take a closer look at the surface of the pot when you buy it, and there will be some subtle scratches or traces of use on the surface of a high-quality iron pot, which is normal because the iron pot will gradually become smooth after a long period of use. On the contrary, if the surface of the pot is too smooth or has a noticeable coating, it may be an inferior iron pot and it is not recommended to buy it.
Secondly, we have to consider the weight of the pot. Generally speaking, high-quality iron pans will be heavier because they use enough materials and can provide better heat preservation. On the other hand, the light and fluttery iron pot may be made of thin iron sheets, which are easy to deform when used and have poor heat preservation, making them unsuitable for long-term cooking.
In addition, we also need to pay attention to the craftsmanship of the pot. A high-quality iron pot goes through multiple processes during the production process to ensure that the edges of the pot are smooth and free of burrs. Such an iron pot is not easy to scratch the spatula when used, and it can also better protect the life of the pot.
Finally, we also pay attention to the brand and ** of the pot. Generally speaking, the quality of iron pots of well-known brands is more guaranteed, and it will be relatively high. If you want to buy a cost-effective iron pot, you can choose some small brands with a good reputation or look for some ** activities.
1.Pay attention to the oil temperature
If you choose the right pot, you must use the right method, otherwise, once there is a deviation in the production process, health risks will creep in. In high temperatures, if the oil temperature rises arbitrarily, the oil smoke will overflow like a spring. Of course, the ignition point of each oil is different, and some oils are more likely to emit smoke at high temperatures.
These fumes contain a myriad of harmful substances, and if inhaled in excess, the risk of cancer, especially lung cancer, hangs over the head. Therefore, choosing the right oil and controlling the temperature when cooking is the top priority to protect your health.
2.Clean carefully
In the daily cleaning of pots and pans, every edge and corner needs to be carefully cared for, and any residue can become a breeding ground for bacteria. Once the body consumes too much, these small bacteria can be a hidden health hazard. In addition, the drying process should not be underestimated.
This is not only to prevent rust, but also to block the spread of germs and put a layer of protective armor on the pot. When it comes to the choice of cleaning products, especially iron pots, you need to be cautious. Cleaners with strong alkalis or acids can cause a chemical reaction that can cause adverse effects on the body.
3.Replace it regularly
No matter what type of pots and pans, they have an inherent lifespan and they can't be used only if they are in perfect condition. To reduce the risk of ingesting harmful substances, it's a good idea to change pots and pans regularly. It is important to know that the service life of pots and pans will gradually shorten after the daily use of cleaning supplies, spatulas and soup spoons. In order to reduce unnecessary distress to the body, changing pots and pans regularly may be a safer solution.