Unit2 Topic2 All these problems are very serious.SectionD课件（22张，无素材）

Topic 2 All these problems are very serious . Unit 2 Saving the Earth Section D Goals .1 Let Ss realize the importance of protecting water . 2.Learn how to write a passage about protect the water resources . air pollution litter light pollution water pollution soil pollution noise pollution Let’s say Group discussion What can you learn form the news report? Water is important. Because humans, animals and plants can’t live without water. Nearly three fourths of the earth is covered with water. water on the earth 3/4 被……覆盖 /'n??l? / 几乎、将近 While there is so much water around the world, we humans are still short of drinking water. So do animals and plants. Do you know why? be short of 缺乏…… 1a Read the passage and put the following paragraphs in the correct order. ( ) The sea seems to have the best answer. There is plenty of water in the sea. But we need to take the salt away from the sea water. This is very expensive. If scientists can find cheaper ways to do it, we can solve the problem of the shortage of water. ( ) How can we avoid a serious water shortage? First, we should save water and not waste it. Second, we should protect our water resources and not pollute them. Third, we should discover ways to reuse water. Scientists have made some progress in this field. Today, some large cities are reusing their water. But people’s need for water is increasing day by day. We still don’t have enough water. What else can we do? ( ) Although the world is hungry, it is even thirstier. While nearly ? of the eath is covered with water, we are still short of drinking water. This is because about 97% of the water on the earth is sea water. So we can’t use it for watering plants or drinking directly. Humans can only drink and use fresh water from places including rivers, lakes and underground. 3 2 1 While-reading Activity 1: Scanning 1. Why is our earth thirsty when ? of the earth is covered with water? Because about 97% of the water on the earth is sea water and we can’t use it for watering plants or drinking directly. 2. What kind of water can humans drink and use? Humans can only drink and use fresh water from places including rivers, lakes and underground. ( )Although the world is hungry, it is even thirstier. While nearly ? of the earth is covered with water, we are still short of drinking water. This is because about 97% of the water on the earth is sea water. So we can’t use it for watering plants or drinking directly. Humans can only drink and use fresh water from places including rivers, lakes and underground. 1 Read and answer. How can we avoid a serious water shortage? First, we should save water and not waste it. Second, we should protect our water resources and not pollute them. Third, we should discover ways to reuse water. ( ) How can we avoid a serious water shortage? First, we should save water and not waste it. Second, we should protect our water resources and not pollute them. Third, we should discover ways to reuse water. ... ...