What causes haze

summary

If you have been to Beijing, then you may be very impressed by the climate there. In Beijing and some cities in the north, there will be a disastrous weather, that is, haze weather, which is bound to have some impact and harm on our human body and traffic, such as causing respiratory diseases, such as traffic congestion Clear the road and so on. What is the reason for the severe haze in the north? Now let's look at the causes of haze.

What causes haze

First, there is a high probability of haze in cities. In densely populated cities, there are many private cars, buses and trucks. The exhaust emissions from these vehicles are one of the causes of haze. In addition, the exhaust emissions from heating in winter in the north are also a factor of haze.

Second: industrial waste gas. As we all know, the productivity level of a country can not be low, so now every city has many large and small factories. When these factories manufacture products, there will be a lot of waste gas discharged from the chimney, and these wastes are also easy to cause haze.

Third: the formation of haze is not only related to the increase of particulate matter, but also related to the climate. If there is an increase of calm wind in the horizontal direction of the city and inversion occurs in the vertical direction, then with the effect of suspended particles, haze will occur.

matters needing attention

What we need to pay attention to is that we have to close our doors and windows in the haze weather, wear masks when we go out, be careful when we usually go out and drive, and at the same time, we have to try our best to control the emission of household exhaust gas.