北师大英语module 8 unit 22 lesson 1 Global Warming.ppt

Kunming 中国的城市可以被分为三类：一是像西安那样的普通城市，春夏秋冬顺序播放；二是像昆明那样的文艺城市，春季单曲循环；三是像安徽这样的城市，城市中的战斗机，战斗机中的VIP，一年四季随机播放……真是众里寻它千百度，它要几度就几度！ Discussion: What problem do these sentences reflect? What causes the problem? pollution drought forest destruction poverty overfishing natural disasters pollution Environmental problems global warming poverty forest destruction endangered animals greenhouse effect One of the biggest problem of 21st century Can we take the heat? By Ellen Lee Task 1: guessing game Try to guess what we will learn in this passage? Task 2: Read the passage quickly and match the headings with each paragraph: 1.What should human beings do. Para. 1 2.Draw readers’ attention to the topic by asking questions. Para. 2 3.What is global warming. Para. 3 4.Consequences of global warming. Para. 4 5. What cause global warming Para. 5 Task 3： Summarize the headings of each paragraph based on those key sentences. Para. 1: ________ of the problem of global warming. Para. 2: The __________ of global warming Para. 3: _______ of global warming Para. 4: ___________ of global warming Para. 5: ___________ to the readers. Introduction definition Causes Consequences Suggestions Task4: T/ F Global warming will surely be the biggest environmental problem in the 21st century. 2. The temperature of the earth depends on carbon dioxide. 3. Without carbon dioxide, we couldn’t live on the earth. 4.Without human beings’ activities, there wouldn’t be global warming. 5. Global warming will contribute to occurrence of many more serious diseases. 6. Not just the government but all of us have a responsibility to do something to help reduce global warming. 7. The US government takes an active part in reducing global warming. F F F F T T F Task 5: Choose the best answer: 1. What does the word “ take ” i