In the process of human metabolism, a large number of chemicals are produced, totaling more than 500 kinds, of which 149 kinds are discharged from the respiratory tract, such as carbon dioxide and ammonia. Let a person read in a room of 10 square meters with doors and windows closed. Three hours later, the detection found that the growth rate of carbon dioxide increased by three times and the ammonia increased by two times. Therefore, the longer the doors and windows were closed, the higher the indoor carbon dioxide concentration. High concentration of carbon dioxide will make people dizzy, tired, nauseous and chest tightness.
The skin is the most important organ of the human body. It includes hair, nails, sebaceous glands, sweat glands and other accessory organs. It is calculated that the skin weight of adult oriental people accounts for more than 10% of their body weight. As the largest organ of the human body and the largest pollution source, the skin excretes 171 kinds of wastes. British scientists have measured indoor dust and found that 90% of the dust is composed of cells shed from human skin.
The outer layer of the skin is the epidermis. Usually, it is constantly dying and constantly emerging from the inner layer of the epidermis. The outer layer of the epidermis that falls off after death is dandruff. In this way, the epidermis of the whole body will change into a new coat after about 27 days. Scientists estimate that about 18 kilograms of skin will fall off in the form of debris in a person’s lifetime. Secondly, there are a lot of hair, dandruff and other falling wastes. In addition, the secretion of sebaceous glands and so on are all emitted from the skin into the indoor air.
Even healthy people, through coughing and sneezing every day, will discharge 40 billion bacteria, germs and other microorganisms, which diffuse in the air and cause pollution. If there are patients in the room, more pathogenic microorganisms and toxic substances will be discharged.
In order to prevent and control these pollution, first of all, we should pay attention to personal hygiene, such as bathing, changing clothes, cutting nails, cutting hair, drying bedding, cleaning and disinfection. Sweep and mop the floor frequently indoors. Wipe and wash the furniture with wet rags to prevent dust from flying. Don’t pile up sundries under the bed. Clean it frequently. If there are patients at home, they should be disinfected in time.
Another important measure to prevent and control pollution is to keep indoor ventilation and light transmission, and often open windows for ventilation; It is better to have a negative ion generator in an air-conditioned room. Those who have conditions can often spray alcohol and air fresheners, or use ultraviolet lamps for indoor disinfection.
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