Cover of the textbook Outcomes Elementary - Student's Book

The key answer of exercise 5

The key to exercise solutions in chapter 15 - It'll solve all our problems for the textbook Outcomes Elementary - Student's Book with authors Hugh Dellar and Andrew Walkley from National Geographic Learning

Question

Work in pairs. Discuss why the writer mentions these things. Then read the article again to check your ideas.

Answer

  1. In many places the economy’s doing badly.
  2. In Morocco they are building huge solar farms.
  3. Nano solar cells could be used in paint to put on the outside of houses.
  4. Very, very small solar cells are being developed for offices.
  5. Red and blue LED lights help plants to grow very quickly. LED lights are bright, last longer than other lights and don’t get too hot.
  6. With LED lights, plants can be grown in a cupboard.
  7. On pink farms, the farmer doesn’t need chemicals because conditions are perfect.

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