PM2.5 refers to particles with a particle size less than 2.5 microns, also known as particles that can enter the lungs and enter the human lungs through breathing; Once PM2.5 enters the human lungs, it is difficult to be discharged through the human body's own ability. Therefore, it will cause irreversible damage to the human respiratory system and is the culprit of lung diseases.
2. There is no Guinness record of not eating, drinking or sleeping. Even before and after, it will not be accepted again, because this process will endanger people's lives, so Guinness will not accept such a record challenge.
3. This actually involves the problem of human comfort. You can find Puweixin imported from the United States in Beijing @D to prevent smog.
The structure of the human body is formed by long-term adaptation to the external environment. The meteorological factor that has the greatest influence on human body is temperature. Man is a warm-blooded animal and a "heat engine", which can convert absorbed nutrients into kinetic energy and release generated heat. Under a certain range of conditions, the human body will adapt and adjust according to cold and heat. For example, when it is cold, muscles tremble to generate heat; Sweat when it is hot, and achieve the purpose of heat dissipation through the evaporation of sweat. In order to keep the body temperature at about 36.5℃ with the least energy consumption, it is necessary to keep the temperature around the body at about 365,438 0.7℃. As far as temperature is concerned, when the ambient temperature is about 365,438 0.7℃, naked people will feel comfortable ... After wearing light clothes, the temperature at which the human body feels comfortable is generally around 28℃.
However, human comfort is related to humidity, and wind speed is related to temperature. It is unscientific to rely solely on temperature.