大学英语口语教程 The Environment.ppt

the environment i. topic work in pairs discussing the following questions, and then share your answers with the whole class. 1.do you know when “world environment day” is? possible answer: world environment day, commemorated each year on 5 june is one of the principal vehicles through which the united nations stimulates worldwide awareness of the environment and enhances political attention and action. 2. what kinds of pollution do you think we have today? possible answer: as far as i know, there are air pollution, noise pollution, and water pollution. 3. what is the root of the environmental problems? possible answer: it is us human beings. we are driven by the greedy needs for more conveniences, we are very often ignorant of the disastrous consequences we are causing. 4. what should we do to take care of our environment? possible answer: we should have a correct attitude towards environment. besides, we should develop strategies and act immediately to protect our environment. ii. aims of the unit 1. learn key words and useful expressions relevant to environment. 2. talk about environmental issues with others in a conversation. 3. getting to know a stranger iii. key words acid rain: 酸雨 global warming: 全球变暖 greenhouse effect: 温室效应 ozone depletion: 臭氧耗竭 waste products: 废品，废物 deforest: 砍伐（森林）( to cut down the forest ) population explosion: 人口膨胀 fossil fuels: 矿物燃料 recycling of waste: 废物回收 energy-efficient: 节能的，能源利用率高的 ecosystem: 生态系统 exploitation: 开采 inexhaustible: 取之不竭的，用不完的 purify: 使纯净，净化 ( to make pure ) carbon dioxide: 二氧化碳 oxygen: 氧 release: 放出，释放 ( set free ) poisonous: 有毒的 break down: 分解 iii. key words 1. the biggest threat to our environment today is that 2. global warming results from , resulting in 3. there will be other effects 4. i see what you mean, but 5. we must realize that 6. with modern technologies, we can 7. thats incredible! iv. key structures v. dialogues dialogue 1 a: what a beautiful park! b: yes. this is the biggest park around here. a: look at the lovely red and golden flowers. do you know what they are called? b:they are tulips. they are imported from holland. a: really? they look so pretty in the sun. oh, im thirsty. could you pass me a bottle of mineral water? b: sure, here you are. (a pause ) a: where can i put the empty bottle? b: you can put it in this plastic bags. a: thank you. can i leave the bag here on the grass? b: no, we cant. thats not allowed. we have to keep the park clean, you know. a: sure. dialogue 2 a: ive heard that there has been a debate over whether to start construction of the three gorges project. b: thats right. the debate has been one unprecedented in world history. and now a consensus has been reached on the important issue and the preliminary construction has started. a: what does the project imply to the environment? will it damage the ecosystem? i think it has some impact on the environment. b: well, i see what you mean, but the the question of whether a construction project should be undertaken hinges not only on its technical feasibility but also, more importantly, on it economic benefits. a: apart from the environment issues, it also means flooding a great big area, forcing people to relocate. b: there is no doubt that the three gorges project entails some disadvantages. but it will unparalleled comprehensive benefits to the nation in terms of flood control, generation of electricity, shipping, and water supplies, etc. vi. situational practice 1. you have a party with your classmates at the seaside. before leaving, you ask to discuss about the wa