Why is the air quality better in summer than in winter?

In summer, the temperature is high and evaporation is accelerated. At the same time, the molecular thermal motion of various gases in the air is obviously intense, and it is easy to carry a large number of inhalable particles. The only advantage of reduced visibility is that the scorching sun evaporates, which makes the humidity in the air high. This is beneficial to the absorption of animals and plants.

The temperature is low in winter and the temperature difference is large during the day. The evaporation conditions of sunlight are poor, and the air humidity is low, which makes it look dry. However, air molecules do not move very violently because of low temperature, so the stable air gap between the air makes the content of inhalable particles low. Excellent visibility in the air. At the same time, the lower temperature makes objects such as sound waves fluctuate and slowly spread into the air, reducing the vibration of the air and the attachment of pollutants. Therefore, the air quality in winter is better than that in summer.

Most of the air you breathe in summer is mixed with the smell of plants and soil, which makes people feel refreshed and mistakenly think that the air quality in summer is better than that in winter. Air quality depends only on its humidity, visibility and inhalable particles.