Grade level: 3rd – 5th grades
Skills: Percentage
Related environmental issues: Air quality
The World Health Organization (WHO) reported that 92% of the world’s population lives in places that are below the air quality standard. As air quality declines, the risk of diseases such as stroke, heart disease, lung cancer, and asthma increases for the people who live in the area.
Air quality map — Areas in red have hazardous air quality
Suppose your school has 100 children in your grade and 92% of them lives in places that are below the air quality standard.
- Our of 100 children, how many children live in places that are below the air quality standard?
- Our of 100 children, how many children live in places that are above the air quality standard?
Sources: WHO, Media Center
WHO, Global ambient air pollution (Interactive map)
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Answer keys
1. 92
2. 100 – 92 = 8