What harm does haze weather do to people?
1. The definition of smog
Smog is a combination of fog and haze. Smog is common in cities. Many areas in China combine fog with haze as a disastrous weather phenomenon for early warning and forecasting, collectively referred to as "haze weather".
Haze is the result of the interaction between specific climatic conditions and human activities. The economic and social activities of high-density population will inevitably emit large amounts of fine particulate matter (PM 2.5). Once the emissions exceed the atmospheric circulation capacity and carrying capacity, the concentration of fine particulate matter will continue to accumulate. At this time, if affected by calm weather, it is easy to cause large-scale pollution. Scope of haze.
2. Sources of smog
1. Car exhaust
Motor vehicle exhaust is the main component of smog particles. Cars using diesel They are "repeated offenders" of emitting fine particulate matter. Although small cars using gasoline emit gaseous pollutants, such as nitrogen oxides, they can easily be converted into secondary particulate pollutants in foggy weather, aggravating smog.
2. The waste gas produced by burning coal for heating in winter in the north.
3. Waste gas emitted from industrial production. For example, metallurgy, kilns and boilers, mechanical and electrical manufacturing, as well as a large number of exhaust gases emitted from the combustion of kilns for auto repair painting and building materials production.
4. Dust generated by construction sites and road traffic.
5. The particle size of growable particles, bacteria and viruses is equivalent to PM0.1-PM2.5. When the humidity and temperature in the air are suitable, microorganisms will adhere to the particles, especially the particles from oil smoke. On the surface, microorganisms absorb oil droplets and transform into more microorganisms, causing the growth of biological toxic substances in the haze to increase.
6. Dust "haze" will also be produced during home decoration. The dust in the room is not only harmful to the health of workers and users, but also increases the burden of cleaning. When the dust is serious, it will also bring many hidden dangers to the decoration project.
3. The impact of haze on humans
1. Inducing respiratory diseases. The composition of smog is very complex, with hundreds of particles in different sizes. These particles pass through human breathing and enter the respiratory tract, causing respiratory diseases such as bronchitis and asthma.
2. Cause cardiovascular and cerebrovascular diseases. In haze weather, the oxygen content in the air is low, which can make the heart beat faster, causing chest tightness and shortness of breath. It is especially harmful to the elderly.
3. Cause various bacterial diseases. Because of the haze weather, the sunlight cannot reach the earth, or the sunlight is weak. This will cause bacterial and viral microorganisms on the surface to multiply rapidly, causing allergies and other diseases.
4. Increased risk of cancer. As we all know, smokers are 60% more likely to develop lung cancer than ordinary people, and smog contains more harmful particles, so smog is more likely to cause cancer than smoking.
5. Makes people feel depressed and irritable. People's mood is easily affected by the weather. When the weather is gloomy and hazy, and the air is polluted, people's mood will become depressed and irritable. Lack of energy to do things.
6. Traffic accidents are prone to occur. Haze weather will reduce visibility. In severe cases, you can only see clearly a few meters away. It poses a great safety hazard to pedestrians and vehicles on the road and is very dangerous.