What is the pollen concentration in Beijing in March 15?

The monitoring results of pollen concentration in Beijing on March 15 showed that the average pollen concentration was 4000 grains per thousand square millimeters, which was extremely high. It is estimated that the number of pollen grains in the urban area on March 17 is 2,800 to 3,000 grains per thousand square millimeters, which is a very high level.

At present, the pollen species in Beijing are mainly poplar, cypress and elm. In the early stage, the weather was fine, the light was enhanced, the temperature rose obviously, and the pollen concentration reached a high level.

It is suggested that people with pollen allergy should avoid outdoor activities as much as possible, take health protection when going out, and stay away from areas with lush flowers and plants.