Why is the smog air quality worse in winter than in summer?

It has to do with the weather.

On the one hand, the northern winter needs heating, although the central heating area is expanding every year, but it is undeniable that there are still a lot of loose coal stoves, and there is no coal burning especially in the countryside, and the contribution of loose coal soot to haze can not be ignored.

On the other hand, autumn and winter are prone to windless, humid, and inverted quiet weather, which is not conducive to the diffusion of pollutants, and the world's major haze pollution events are basically inseparable from such weather conditions.

It has to do with the weather.

One of the reasons for the natural conditions is man-made: the use of coal as fuel for heating in winter, coupled with vehicle exhaust emissions, and the lack of green area. Individuals should pay attention to hygiene, consume more fruits and vegetables, purified water, light diet, and strengthen exercise.

1. The north needs to be heated in winter, and there are still a lot of loose coal stoves, especially in the countryside, which basically burn coal, and the contribution of loose coal smoke to haze cannot be ignored.

2. In autumn and winter, it is easy to have windless, humid, and inverted quiet and stable weather, which is not conducive to the diffusion of pollutants.

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First, in winter, people spend less time going out and more activities indoors, and the body exhales more carbon dioxide, cooking fumes in the kitchen, and smoke caused by smoking than at other times; Second, in order to prevent the loss of indoor heating energy consumption in winter, the daily window ventilation machine at home is reduced, and indoor decoration pollutants or dirty air with microorganisms, viruses and bacteria are more likely to gather; Third, the use of heating appliances and heating equipment in winter will increase the indoor temperature, and toxic gases such as formaldehyde in decoration materials or furniture will be greatly stimulated and released. For example, formaldehyde, the most common decoration pollutant, begins to be continuously released when the indoor temperature reaches 19 degrees, and the formaldehyde concentration increases twice for every 1 degree increase in temperature, and the formaldehyde release period can be as long as 3-15 years; Fourth, the temperature decreases in winter, the effect of ventilation and sewage is weakened, and when the indoor temperature is lower than 20, the effect of opening windows to ventilate and remove decoration pollution begins to be greatly weakened. When the indoor temperature is lower than 10, all the decoration pollution will accumulate in the room and will no longer be released to the outside.

Even if the windows are open for ventilation all day and month, the effect of removing decoration pollution is not significant.

I am the child's parent, and the child uses my mobile phone to log in to QQ, which I occasionally find. I really can't imagine that some of you *** people are talking, are you students or what kind of people? When you say something like this, does your child usually communicate with you all the time?