The haze is raging again, and parents are worried about how much it affects their babies’ health. Can I take my baby out? What can be done to prevent and reduce the damage caused by the haze? What is haze made of? It is mainly composed of three components: sulfur dioxide, nitrogen oxides and respirable particulate matter. The first two are gaseous substances, but respirable particulate matter is the culprit that aggravates the pollution of hazy weather, and they combine with fog to make the sky instantly gray and lingering for a long time. What does PM2.5 mean? A: PM – abbreviation for particulate matter; 2.5 – diameter equal to 2.5 microns; PM2.5 – aerodynamic equivalent diameter less than or equal to 2.5 microns of polluting particulate matter. Because PM2.5 is often detected in Beijing, haze detection mostly refers to PM2.5 values. How is haze formed? 1. exhaust gas from cars; 2. exhaust gas from burning coal for heating in the north; 3. exhaust gas from industry; 4. dust from construction sites and road traffic; 5. dust from home renovation; 6. others. Fog and haze, how to distinguish them? Fog and haze are essentially different, the biggest difference is that haze is harmful to humans, while fog is relatively safe. The fundamental reason is that fog and haze consist of different components, and haze includes respirable particulate matter in addition to fog. The main identification from the following six aspects: color, composition, duration, distribution, visibility and danger. Common hazards 1, asthma: foggy days with little wind and full air flow, pay attention to protection to avoid asthma attacks; 2, bronchitis: mostly seen in cold weather haze days, the latter sudden climate change haze days; 3, cerebral hemorrhage: foggy weather pressure is low, the oxygen content of the air drops, easy to lack of oxygen chest tightness; 4, hypertension: fog is inhaled will increase the body’s oxygen consumption, affecting vascular contraction function; 5, conjunctivitis: air pollution, the 5, conjunctivitis: air pollution, smoke, irritant gas will stimulate the conjunctiva cause conjunctivitis; 6, pharyngitis: air pollution, smoke, irritant gas inhalation will stimulate the throat cause pharyngitis. From the respiratory and circulatory system hazards according to the size of the haze respirable particles diameter, the harm to the human body is basically progressively aggravated: PM10 stays in the upper respiratory tract, triggering pharyngitis; PM2.5 enters the bronchial tubes, triggering bronchitis; PM1 enters the blood circulation, triggering myocardial ischemia, hypertension, cerebral hemorrhage; PM0.5 enters the cardiovascular system, triggering myocardial ischemia, hypertension, cerebral hemorrhage, etc. PM0.1 is deposited in the alveoli, causing pneumonia, pneumoconiosis, pulmonary fibrosis, etc. Cough caused by haze is characterized by cough as the main or only symptom, without any respiratory disease. There are no positive findings on physical examination. It is characterized by a violent dry cough, paroxysmal, similar to whooping cough; or accompanied by coughing sputum, or wheezing, or chest and abdominal pain. Haze warning signal interpretation 1, yellow warning signal A, visibility less than 3000 meters and relative humidity less than 80% of the haze. B, visibility less than 3000 meters and relative humidity greater than or equal to 80%, PM2.5 concentration greater than 115 micrograms / cubic meters and less than or equal to 150 micrograms / cubic meters. C. Visibility less than 5000 meters, PM2.5 concentration greater than 150 micrograms/m3 and less than or equal to 250 micrograms/m3. 2.Orange warning signal A.Haze with visibility less than 2000 meters and relative humidity less than 80%. B.Visibility less than 2000 meters and relative humidity greater than or equal to 80%, PM2.5 concentration greater than 150 micrograms/m3 and less than or equal to 250 micrograms/m3. C. Visibility less than 5000 meters, PM2.5 concentration greater than 250 micrograms/m3 and less than or equal to 500 micrograms/m3. 3.Red warning signal A.Visibility less than 1000 meters and relative humidity less than 80% haze. B, visibility less than 1000 meters and relative humidity greater than or equal to 80%, PM2.5 concentration greater than 250 micrograms / cubic meters and less than or equal to 500 micrograms / cubic meters. C. Visibility less than 5000 meters, PM2.5 concentration greater than 500 micrograms/m3. How to protect from haze? 1.According to the weather forecast, open the windows and ventilate at the right time; 2.Reduce outdoor activities when the yellow warning of haze; 3.Comprehensive publicity of anti-haze protection knowledge; 4.According to the level of haze warning signal, do proper protection. A, yellow warning protection: drivers drive carefully; due to the significant reduction in air quality, personnel need to be properly protected; patients with respiratory diseases to minimize going out, when going out can bring a mask. B. Orange warning signal: Poor air quality, personnel need to be properly protected; general population to reduce outdoor activities, children, the elderly and susceptible people should avoid going out as far as possible. C. Red warning protection: Pollution units take measures to control the production of polluting processes and reduce pollutant emissions; stop outdoor sports events; kindergartens and primary and secondary schools stop outdoor activities; stop outdoor activities, close indoor doors and windows, and wait until the warning is lifted before opening windows for ventilation; children, the elderly and susceptible people stay indoors; minimize energy consumption such as air conditioning, reduce daytime refueling of motor vehicles for drivers, and turn off the engine when parking. Wear a mask when you go out, take public transportation as much as possible and reduce the number of cars on the road; wash your lips, nose, face and bare skin immediately when you return from a trip. We all work together to maintain: low-carbon environmental protection, starting from life. Use environmentally friendly bags, save electricity, save water, travel simply, climb stairs, etc.