Red Net Moment News, December 12 (Correspondent Wang**) According to the World Health Organization, household air pollution caused 3.2 million deaths in 2020, including more than 230,000 children under the age of 5. Some scholars have calculated that modern people spend more than 80% of their lives indoors. Indoor air quality is closely related to our health, what indoor air pollutants will be in the environment where we live and work every day?
Indoor air pollution refers to the increasing number of harmful substances in the indoor air due to the introduction of pollution sources that can release harmful substances indoors or poor ventilation of the indoor environment, and when the harmful substances reach a certain concentration in a limited space, they will have a harmful impact on human physical and mental health. On July 1, 2022, the state issued the GB T18883-2022 "Indoor Air Quality Standard", which will be implemented on February 1, 2023. Indoor air should be non-toxic, harmless, and odorless. Next, Changsha CDC will take you to understand the types and hazards of the main pollutants in indoor air.
1. Chemical pollutants.
Combustion products. **Fuel for cooking, heating and tobacco are a variety of pollutants produced after combustion.
Hazards: Coal combustion with high fluorine and arsenic content can cause fluorosis and arsenic poisoningThe combustion products SO and NOx can have an irritating effect on the human body and mucous membranesTobacco combustion produces harmful substances, which can have obvious damage to the respiratory, nervous, circulatory, endocrine, reproductive and immune systems of the human bodySmoking is the main cause of lung cancer, and can also cause laryngeal cancer, pharyngeal cancer, oral cancer, esophageal cancer, etc. It is worth noting that the harm of passive smoking to human health cannot be ignored.
Formaldehyde. Formaldehyde is found in a variety of decorative and building materials, and can also be derived from cosmetics, detergents, etc. Usually when the room temperature is above 19, formaldehyde in the object is easy to be released.
Hazards: Irritating effect: When the formaldehyde content in the indoor air reaches 0At 5mg m, it can irritate the eyes and cause tearing;At higher concentrations, it can cause nausea and vomiting, coughing, chest tightness, wheezing, and even pulmonary edemaWhen it reaches 30 mg m, it is immediately fatal. Sensitization: Exposure to a certain dose of formaldehyde can cause allergic dermatitis and induce bronchial asthma, and in large quantities, it can cause allergic purpura. Carcinogenic and carcinogenic effects.
Cooking fumes. **A group of mixed pollutants produced by edible oil when the oil temperature reaches 250 when stir-frying and frying food.
Hazards: A risk factor for lung cancer.
2. Physical pollutants.
Noise. Production, living and transportation.
Hazards: Affects rest and sleep;Affects quality of life and work efficiency;Damage to the auditory and central nervous systems.
3. Biological pollutants.
Dust mites and mold.
*: In the case of indoor humidity and poor ventilation, mattresses, bedding, pillows and other textiles are easy to breed. Rooms with more air-conditioners are more likely to breed dust mites.
Harm: It can cause epidemics, allergic asthma, allergic rhinitis, allergies, etc.
4. Radioactive contaminants.
Radon. **From foundation soil, building materials.
Harm: One of the main carcinogens, it is the second largest culprit of human lung cancer after cigarettes.