Is it really necessary to ban the production of "smoked bacon" and the formation of haze weather?

There are many sources of smog, such as automobile exhaust, industrial emissions, building dust, garbage incineration, and even volcanic eruption. Hazy weather is usually formed by the mixed action of various pollution sources. However, in smog weather in different regions, different pollution sources have different functions.

Haze weather has existed since ancient times, and human activities or natural phenomena such as slash-and-burn and volcanic eruption may lead to haze weather. However, after mankind entered the era of fossil fuels, the smog weather really threatened the living environment and health of mankind. Rapid industrialization and urbanization lead to rapid energy consumption, high concentration of population and destruction of ecological environment, which have laid the groundwork for the formation of haze weather.

The formation of smog has both a "source" and an "accomplice", which is a meteorological condition that is not conducive to the spread of pollutants. Once pollutants accumulate for a long time under static meteorological conditions, it is easy to form haze weather. The formation of smoke has three elements:

The first is the physical basic source of particulate matter. China has the largest loess plateau in the world, and its soil texture is the easiest to produce granular dust particles.

Second, poor exercise leads to dust. For example, the mud in the garden in the middle of the road and the soil on the roadside stones will flow to the road after raining or splashing water, which will produce a lot of dust after one hour of drying. Even if these particles fall back to the ground, they will be thrown over the city again because of the continuous passing of cars.

Thirdly, the basic source of dust and the process of movement difference gather in a certain spatial range, and particles finally gather with water molecules to form haze. At present, in more than 350 cities in the Loess Plateau of China, the three elements of smog structure are quite rich.

What we can do is to cut off human factors.

human factor

Sources of toxic particles in cities:

First: it's automobile exhaust. Large vehicles that use diesel are "recidivists" who emit PM 10, including buses, shuttle buses of various units and large transport trucks. Sources of toxic particulate matter in cities: firstly, automobile exhaust. Cars that use diesel are "habitual criminals" who emit particles. Small cars that use gasoline emit gaseous pollutants, such as nitrogen oxides, which are easily converted into secondary particulate pollutants in foggy days, aggravating smog.

Vehicle exhaust is the main component of smog particles. According to the latest data, motor vehicle exhaust accounts for 22.2%, coal combustion accounts for 16.7%, dust accounts for 16.3%, and industry accounts for 15.7%. However, with the development of automobile technology and the improvement of oil quality, environmental managers have found that motor vehicle exhaust does not play a decisive role in the formation of haze weather. However, as some cities with large car ownership, managers still need to control vehicle emission standards to avoid the formation of haze weather.

Second: the waste gas produced by burning coal for heating in winter in the north.

Third: the waste gas emitted by industrial production. For example, metallurgy, kilns and boilers, electromechanical manufacturing, automobile repair and paint and building materials production produce a lot of waste gas from kiln combustion.

Fourth: Dust generated by construction sites and road traffic.

Fifth, 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 appropriate, microorganisms will attach to particles, especially oil fume particles, which will adsorb oil droplets and transform them into more microorganisms, which will increase the growth of biotoxic substances in smog.

6. Dust "smog" will also be produced in home decoration. Indoor dust is pervasive, which is not only harmful to the health of staff and users, but also increases the cleaning burden. When the dust is serious, it also brings many hidden dangers to the decoration project. [4] [5]

In addition to meteorological conditions, the increase of atmospheric particulate matter (including coarse particulate matter PM 10 and fine particulate matter PM2.5) caused by industrial production, vehicle exhaust emissions and coal burning in winter is an important factor of smog. At present, the level of pollutant discharge in many cities is at a critical point, which is very sensitive to meteorological conditions. When the diffusion conditions are good, the air quality can reach the standard, and once adverse weather conditions are encountered, the air quality and visibility will drop immediately.

Preventive measures:

1, open the window less in foggy days. When going out, you must wear a mask, drink plenty of water, soak chrysanthemum tea and other Chinese herbal teas to prevent diseases, eat more fruits, and thoroughly clean your skin and hair after coming home from the outside. In addition, the elderly who like morning exercises and shopping in the food market should pay attention to reducing going out, because smog is extremely harmful to the health of the elderly.

2, wear a mask when going out, and the United States imports Puweixin Tmall, which effectively prevents smog.

Step 3 drink more tea

4, the right amount of vitamin D.

5. Eat lightly and drink plenty of water

Step 6 eat more vegetables

7. Minimize going out in foggy days [6]

8. Pay attention to the speed when driving.

9. Protect yourself when going out, wear a special anti-fog PM2.5 mask and anti-fog nose mask, filter PM2.5, and breathe fresh air anytime and anywhere.

10, avoid moving in foggy days. You can do morning exercises after the sun comes out. You can also switch to indoor sports.

1 1. The patient insisted on taking the medicine. Patients with respiratory diseases and cardiovascular and cerebrovascular diseases should insist on taking medicine on time in foggy days.

12, don't close the window too tightly. You can choose to open the window for a short time at noon with sufficient sunshine and less pollutants.

13, try to stay away from the road. The concentration of pollutants is the highest when large cars enter the city during peak hours and at night.

14, calcium, vitamin d, eat more tofu, Sydney, etc.