Across
- 3. providing water to grow plants and crops
- 6. the people who live in a place
- 8. the removal of salt from sea water
- 9. for the new university ccourse begins next Monday
- 11. doubting that something is right
- 13. made someone decide to do something
- 14. ___problems will increase if we don't stop using our cars so much
- 15. using natural energy and products that don't harm the environment.
- 16. to study one particular object
- 18. most difficult for people to bear
- 19. different from what is usual or traditional
- 21. there are some ___regional differences between the north and south of the country
- 22. few people can bear to live in the Arctic environment. It's extremely___
- 23. that can be replaces naturally
- 24. ___roads are one of the principal problems of modern cities
- 25. the students didn't like her ___ teaching methods.
Down
- 1. ___has destroyed large areas of tropical forest in South America
- 2. normal or ordinary
- 4. the shop ___ was very helpful
- 5. not possible for humans to live in
- 7. protected from direct light
- 10. ___of rivers is often caused by factories
- 12. a way of describing the size, amount, etc. of somethine
- 17. a lot of people on the planet are___
- 20. citizens are being encouraged to use public transport during____