Do you know the Air Quality Index（空氣質(zhì)量指標(biāo)） or AQI report in the newspaper? The AQI helps us understand what the air quality around us means to our health. The AQI uses colours, numbers and words to tell us about the air. What do these colours and numbers mean? Let’s have a look.

AQI Colours

AQI Numbers

Health Word（s）

Green

0—50

Good

Yellow

51—100

Moderate（適中）

Orange

101—150

Unhealthy for sensitive（敏感的） groups

Red

151—200

Unhealthy

Purple

201—300

Very unhealthy

When the AQI colour is green, just enjoy the clean air!Yellow shows the air quality is fine for most people. Orange tells us people with lung disease（肺�。� should spend less time outdoors. When the AQI colour is red, people with lung disease and active kids and adults shouldn’t spend too much time outdoors. Everybody else should try to spend less time outside. Purple shows everybody should try not to go outside.

1.The AQI doesn’t use to show the air quality.

A. pictures B. colours C. numbers D. words

2.If the AQI colour is , the air quality is good for most people.

A. orange B. red C. purple D. yellow

3.If the weather report says today’s AQI is 250, we should .

A. enjoy the clean air B. try not to go outside

C. spend more time outside D. stay inside some of the time

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