The key answer of exercise 3
The key to exercise solutions in chapter Video 7 - Air pollution tracking for the textbook Outcomes Intermediate - Student's Book with authors Hugh Dellar and Andrew Walkley from National Geographic Learning
Question
Watch the video and answer the questions. Then work in pairs and compare your ideas.
Answer
- It’s trying to get a picture of the urban atmosphere.
- Local people collect the information by walking around their community. They wear a backpack with a sensor which takes in lots of small air samples and analyses them.
- We might have detailed maps to show air quality. These might be used to help people make choices, e.g. when buying a house or choosing a day-care centre.
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