Hazy weather reduces outdoor activities and generally does not last long.

Smog weather reduces outdoor activities, and the general outdoor activities time is no more than 6 hours.

When the Meteorological Observatory issues a yellow warning of heavy air pollution, it shall reduce the outdoor working hours of employees, and the longest working hours shall not exceed 6 hours, and provide protective measures such as masks for employees working outdoors; Employees with cardiovascular and cerebrovascular diseases or respiratory diseases should try to avoid arranging them to engage in outdoor work.

Suspend large-scale outdoor activities when receiving the orange warning of heavy air pollution issued by the Meteorological Observatory; Reduce the outdoor working hours of employees, and the longest working hours shall not exceed 4 hours, and provide protective measures such as masks for employees working outdoors; For indoor workplaces, measures such as closing windows and adding air purification facilities should be taken to reduce the harm of heavy air pollution to employees.

Basic information

If you have to go out in foggy weather, wearing a mask is the most important protective measure. Any mask has a certain protective effect, but it is recommended to choose a mask with good protection. According to the national standards, the protection level of masks is divided into four levels from low to high: D, C, B and A, corresponding to different air quality conditions.

Grade A corresponds to "serious pollution" and is used when the concentration of PM2.5 reaches 500 micrograms per cubic meter. Grade D corresponds to "moderate and below pollution" and is applicable to the case where the concentration of PM2.5 is less than or equal to 150 μ g/m3. Wearing a mask should follow the instructions for use. When wearing, be sure to completely cover your nose, mouth and chin, and keep the mask close to your face. The better the sealing performance, the better the protection effect.