Across
- 4. , 'we're trying to reduce our ... by using our bikes more and the car less'
- 6. , 'although we can't see it, the ... protects us from dangerous UV radiation'
- 7. , become less common and then disappear.
- 8. , 'the ... means our planet is becoming warmer than it should be'
Down
- 1. , 'Governments are now more concerned about ..., but they still don't do enough to control economic growth'
- 2. , destroy completely.
- 3. , if sth ... you don't have any more of it.
- 5. , make a tree fall by cutting it.