The argument that mobile phones and WiFi affect health has been endless. Wechat and Weibo even circulated an experiment made by Danish middle school students: seeds placed in ordinary rooms can grow normally, while seeds placed in an environment with WiFi will turn brown, and some even die. Truth: The World Health Organization points out that there is no evidence that mobile phone radiation will have a negative impact. Gao Yougang, a professor at China Branch of Electromagnetic Noise and Interference Committee of International Radio Science Union, said that WiFi is actually a small local area network, and its transmitter wireless router will generate certain electromagnetic radiation around it. The working power of ordinary wireless routers is mostly between 30 and 500 MW, which is lower than that of ordinary mobile phones (about 125 MW ~ 2 W). Generally speaking, using a mobile phone for 20 minutes absorbs more radiation than using a wireless router for a year. It can be seen that the impact of WiFi radiation on health is minimal, so people don't have to worry too much about the radiation of mobile phones.

Cooking food in a microwave oven can cause cancer.

Once there was an article called "Please stop using the microwave oven immediately" which was widely circulated on the Internet. The article points out that microwave heating will change the molecular structure of food and produce new molecules that the human body can't recognize. These strange new molecules are toxic and may even cause cancer. Truth: Professor Zhang Zhaotang, an expert in microwave power application and measurement technology in China, said that microwave heating is completely physical heating, which is basically the same as conventional open flame heating and has the same influence on food molecules. Fan Zhihong, an associate professor at the College of Food Science of China Agricultural University, also said that microwave only heats water molecules in food, and the food itself has not undergone chemical changes, so it will not produce carcinogens. Lu Jianguo, director of the Comprehensive Inspection Department of the National Household Appliance Quality Supervision and Inspection Center, believes that as long as the products are qualified, the radiation and food safety risks brought by microwave ovens are within the acceptable range of human beings. Consumers should pay more attention to how to use the microwave oven correctly, such as avoiding heating for too long, avoiding putting ordinary plastic containers and plastic bags into the microwave oven for heating, avoiding using closed containers, and avoiding heating shelled foods such as eggs.

Hair dryer is a high radiation killer.

Using the hair dryer three times in a row is equivalent to taking X-rays. There has been a saying circulating on the Internet. Others say that if the hair dryer acts on the head at close range for a long time, it will be very lethal. Truth: Zhang Zhiqiang, director of the Environmental Protection Office of Peking University, said that ionizing radiation, represented by X-rays and nuclear radiation, will do harm to human body because of its short wavelength, high frequency and high energy. Long-term exposure to ionizing radiation may damage the genetic system or cause cancer. Household appliances only produce electromagnetic radiation, not ionizing radiation. All objects in nature will inevitably have electromagnetic radiation as long as the temperature is above absolute zero. As long as household appliances are qualified products, their electromagnetic radiation values are within the safe range.

Rumors that seem to be "scientific" are deeply rooted in people's minds, and even if they are refuted by experts, they will still make a comeback. If we don't make a distinction, it is likely to damage our health because of some wrong behaviors.