10. EARTH

14. Lake Baikal Dunhuang Gebi China India Mediterranean Sea Germany USA Alska Russia Task: Find the places on the map of the world where the damage has happened.

15. Earth

16. Dunhuang used to be a great city 1.increase cattle 2.rain fail to come 3.not kill cattle 4.grass eaten up 1.trees cut down 2.rain falling 3.soil washed down 4.soil blown away Dunhuang has become a desert Cattle problem Soil lost

17. Air

18. ReasonsYearCountryBad results Germany Russia India Air pollution Chemical rain A cloud of radiation by the year 1986 in 1984 Dangerous gas 2,500 people killed(injured, lost their sight) 125,000 people died 50% of trees damaged in 1986

19. Water

20. Water pollution examplesplacesbad results The Mediter- ranean Lake Baikal An oil tank hit a rock in 1989 between Europe and Asia 1. no longer safe for swimming 2. not safe to eat the fish no longer 700 kinds of plant and animal life living 1. more than 34,000 birds killed 3. 4,800 square kilometres polluted 2. 10,000 animals killed in Asia northwest coast of Alaska

21. 1.Many parts of the world with large population and plenty of crops have become desert. 2. Land may become poor if farmers do not limit their cattle. 3. Good soil is gradually lost these days as trees are being cut down. 4. Air pollution and water pollution are the two causes of problem that many parts of the world have become desert. 5. Chemicals in the smoke from power stations can travel hundreds of miles before falling down to the ground. 6. After a bad accident at a nuclear power station, 50%of the trees in Germany were damaged. 7. The writer uses the examples of the accidents in both India and Russia to explain how water is polluted. 8. Once oceans are polluted, they are not able to clean themselves. T T T F F F F T

22. Dunhuang used to be a great city 1.increase cattle 2.rain fail to come 3.not kill cattle 4.grass eaten up 1.trees cut down 2.rain falling 3.soil washed down 4.soil blown away Dunhuang has become a desert Cattle problem Soil lost

23. Discussion: What do you think we should do to protect our earth?

24. Saving the earth !