What is the function of the air filter?
Release time:
2020-10-13
Air pollution filters play an important role. According to the definition of the International Organization for Standardization, air pollution usually refers to human activities or natural processes, which use air filters. Certain substances enter the atmosphere and show sufficient concentration to reach sufficient Time, thereby endangering human comfort, health and welfare or the environment, soAir filtercame into being.
Air filters play a large role in air pollution. In other words, as long as the amount, nature and time of a substance is sufficient to affect human beings or other organisms and properties, we can call it air pollution; and the phenomenon caused by its existence is air pollution. On October 27, 2017, the list of carcinogens released by the World Health Organization (WHO) International Research Agency (WHO) was preliminarily compiled for reference. Outdoor air pollution is included in the list of primary carcinogens.
The atmosphere is a mixture of nitrogen, oxygen, carbon dioxide, water-based gases and solid impurities. As far as air is concerned, I believe anyone who has studied chemistry knows that under standard conditions, ammonia accounts for 78.08, oxygen accounts for 20.94, and oxygen accounts for 1/5 of the total air. Noble gases account for 0.93 percent, and other gases and impurities about 0.02 percent. Natural variations often lead to changes in the composition of the atmosphere.
There are many sources of air pollution. For example, when a volcano erupts, a large amount of dust and carbon dioxide and other gases are ejected into the atmosphere, causing the smoke in the volcanic eruption area to spread, and the toxic gas is very heavy; large-area forest fires caused by lightning strikes and other natural impurities will also increase The content of carbon dioxide and smoke particles, which highlightsAir filterThe importance.
Kangxi Qianlong died in the haze? Or the "haze disaster" caused a lot of burning charcoal for heating, and the emperor became a victim of air pollution. What is this? A few days ago, Taiwan media said that Kangxi, Qianlong and many other Qing emperors may have died in the smog
Someone has published an anecdote you won't hear in history class: the history of medicine you didn't know. How air pollution became the cause of the emperor in ancient times is analyzed. Tan Jianxie found that 10 Qing emperors, including Kangxi and Qianlong, died in the cold winter in Beijing. This is the most dangerous disorder for the elderly to die from cardiovascular disease. Beijing has been suffering from smog since the Yuan Dynasty, and smog is also one of the factors that add fuel to the fire.
If there was an air filter, maybe they wouldn't die like this
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