Cover of the textbook Outcomes Intermediate - Student's Book

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

  1. It’s trying to get a picture of the urban atmosphere.
  2. 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.
  3. 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.