英语听力教程3.doc

unit1 Listen to two short extractions. Write down the environmental issues mentioned in them. 1. burning of the forests/tree removal(deforestation)/reduction of the worlds rain forests 2. global warming/greenhouse effect/emissions of CO2 Listen to the first part of an interview. Note down the key words in the notes column.Then answer the questions. 1. 2. Growing crops stabilize soil, without them the top soil just blows away. But if there isnt enough rain the crops dont grow. 3. People try to grow food to support themselves or to create ranches where cattle can be raised, or to get hardwood for export, or to make way for an iron ore mine. Now try this: listen to a more authentic version of the first part of the interview. Complete the outline. Outline (I) I. Environmental problems in different continents A. Africa 1. Sahara Desert expansion 2. no grass for animals to eat(East Africa) B. North America most of Europe 1. situation-intensive farming/agriculture 2. potential problem — top soil blowing away C. South America, Central Africa Southern Asia 1. problem — tropical forests destruction 2.consequences a. soil - thin - unproductive - wasteland b. animal/plant species becoming extinct c. climate change for the whole world Listen to the second part of the interview. Note down the key words in the notes column. Then answer the question. 1.Trees would hold rainfall in their roots. When forests in the higher up-river have been destroyed, all the rain that falls in the monsoon season flows straight into the river and starts the flooding. 2. He implies that some national governments just consider the results of their policies in the near future, or just think as far ahead as the next election. Now try this: listen to a more authentic version of the first part of the interview. Complete the outline. Outline(II) II. Reason for some natural disasters — mainly man-made A. flooding in Bangladesh B. flooding in Sudan III. Ac