课件32张PPT。With your support, we can make WED the biggest global celebration of environmental action!Table of Contents14253quizHow much do you know about water?Choose a number and decide it’s true or false.By the time a person feels thirsty, his or her body has lost over 1% of its total water amount. True!About 90% of the huge amount water on earth is sea water.False!97%Nearly 60% of the earth’s surface is covered with water. False!75%A healthy person can drink about three gallons (48 cups) of water per day. True!We should drink water only when we feel thirsty. False!We should drink water constantly even though we do not feel thirsty. Watersea/salt water fresh water 97%3%How much water do we have?Look at the following pictures and then write a title for each of them on the given line. drought ?[draut]desertification ?air pollution Is it necessary for us to focus our attention on the environmental problems? Why?List your reasons here.Discussion Pair workHave you done anything in your daily life to protect our environment?Are you a environment-friendly person? Why or why not?Please talk about the following questions in pairs.Scan the coming two passages and choose one title for each of them.World Environment Day 2) Water Supply 3) Environmental Pollution 4) Saving WaterPassage 1Passage 2Passage 1 The world is not only hungry, but also thirsty for water. This may seem strange to you, since nearly 75% of the earth’s surface is covered with water. But about 97% of this huge amount is sea water, or salt water. Man can only drink and use the other 3%—the fresh water that comes from rivers, lakes, under ground, and other sources. And we cannot even use all of that, because some of it is in the form of icebergs and glaciers. Even worse, some of it has been polluted.Saving Watericeberg [?aisb?:g]Titanic struck an iceberg and then sank to the bottom of the sea. A glacier is an extremely large mass of ice which moves very slowly, often down a mountain valley. glacier [?gl?si?]? However, as things stand today, this small amount of fresh water, which is constantly being replaced by rainfall, is still enough for us. But our need for water is increasing rapidly— almost day by day. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industry. We all have to learn how to stop wasting our precious water. One of the first steps we should take is to develop ways of reusing it. Experiments have already been done in this field, but only on a small scale. These systems are as important as the spacecraft for our future.He’s growing stronger and stronger day by day. She drinks coffee day after day. What’s the difference between day by day and day after day?Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. Please paraphrase this sentence.Passage 2 World Environment Day (WED) is a day we ... ...
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