1. Ask Ss to look at the picture. Ask some questions as warm-up: What do the colours indicate? What energy sources will be used in the future? Why is our planet placed in the hand of a person?

Suggested answers

–     The clear, blue sky and green grass indicate that there will be no pollution.

–     Wind power (or renewable energy) will be used in the future.

–     The future of our planet is in the hands of humans. People’s activities will affect life on Earth.

• Have Ss use a dictionary to find the meaning of the words in the box, if necessary, and complete the sentences with the correct forms of these words.
• Explain the difference between inhabitant and dweller.

Notes

Inhabitant and dweller have a similar meaning: a person or animal that lives in a particular place. The difference is mainly in their collocations (especially in compounds).

Examples:

–     the inhabitants of New York City / New York City’s inhabitants 

       (structure: inhabitant(s) of + location / location’s inhabitant)

–     city dwellers, town dwellers, apartment dwellers (all compounds)

       (structure: location + dwellers)

Key

1. a warning       2. detect                  3. a sensor

4. promote         5. an insoluble       6. dwellers