What is the air quality index that is not suitable for exercise? The weather is gray every day. I want to play ball, but I'm afraid it's not good for my health. . .

The air quality is divided into six levels according to the size of the air quality index, which corresponds to the six categories of air quality. The greater the index, the higher the level, the more serious the pollution situation, and the greater the harm to human health.

Air quality index

Air quality index level

Air quality index category

And represents color.

Effects on health

Suggested measures

0~50

Level a

excellent

green

The air quality is satisfactory and there is basically no air pollution.

All kinds of people can move normally.

5 1~ 100

assistant

okay

yellow

The air quality is acceptable, but some pollutants may have a slight impact on the health of a very small number of abnormally sensitive people.

Very few people who are extremely sensitive should reduce outdoor activities.

10 1~ 150

Three levels

light pollution

orange

The symptoms of susceptible people are slightly aggravated, and healthy people have irritating symptoms.

Children, the elderly and patients with heart disease and respiratory diseases should reduce long-term and high-intensity outdoor sports.

15 1~200

Totally good.

Moderate pollution

red

Further aggravating the symptoms of susceptible people may have an impact on the heart and respiratory system of healthy people.

Children, the elderly and patients with heart disease and respiratory diseases should avoid long-term and high-intensity outdoor sports, and the general population should moderately reduce outdoor sports.

20 1~300

Piati

Serious pollution

purple

The symptoms of patients with heart disease and lung disease are obviously aggravated, and their exercise tolerance is reduced. The symptoms are common in healthy people.

Children, the elderly and patients with heart disease and lung disease should stay indoors and stop outdoor sports. Ordinary people should reduce outdoor sports.

& gt300

College English Test Band-6

Serious pollution

maroon

The exercise tolerance of healthy people is reduced, the symptoms are obviously strong, and some diseases appear in advance.

Children, the elderly and patients should stay indoors to avoid physical exertion, and the general population should avoid outdoor activities.