Why can Beijing's air index of 500 be seen far today?

Air quality status

Effects on health

Suggested measures

0-50 excellent air quality is satisfactory, basically no air pollution, no harm to health. All kinds of people can take part in outdoor activities and breathe more fresh air.

5 1- 100 is good, except for a few people who are particularly sensitive to certain pollutants, it will not cause harm to human health. Except for a few people who are particularly allergic to certain pollutants, others can carry out outdoor activities normally.

10 1- 150 The symptoms of lightly polluted people will be slightly aggravated, but it has no obvious effect on healthy people. Children, the elderly and patients with heart disease and respiratory diseases should try to reduce outdoor activities with high physical exertion.

15 1-200, the symptoms of moderately polluted people are further aggravated, which may affect the heart and respiratory system of healthy people. Children, the elderly and patients with heart disease and respiratory diseases should try to reduce going out and stay indoors, and the general population should appropriately reduce outdoor sports.

20 1-300 The poor condition of heavily polluted air will cause serious harm to everyone's health. Children, the elderly and patients with heart disease and lung disease should stay indoors and stop outdoor sports. Ordinary people should try to reduce outdoor sports.

& gt The seriously polluted air is in extremely poor condition, and everyone's health will be seriously endangered. Children, the elderly and patients should stay indoors to avoid physical exertion, and the general population should try not to stay outdoors except those with special needs. Pay attention to protection when going out. Puwei new Tmall imported from the United States.