Unit 9Saving the earthHelpWhat is the biggest problem facing the earth?why do you think so?Air pollutionWhat causes the problem? What can we do to solve the problem?desertificationWhy is more and more land becoming desert?1:03 结束a vedio tape （earth）Starvation(hunger) and povertywhat causes the water pollution?1. Why is she giving this speech?2. What does she think the most serious problem is?3. What does she say we should do about it ?1)_2)_3)_water pollutionLearn to take better care of our waterStop polluting waterLearn to save water in our daily life To celebrate Earth Day.Part 2Outline the speakers arguments.Argument 1: we should _.We must _. We must _.If we _, we _.take better care of our waterusetechnologyto solve the problem.work and share careful Argument 2:_.Problem:_ _. Solutions: _. _. _ _. _ _.We must stop polluting our waterpolluting at an alarming pace. pollute the air and the water change the way not drive try not to more than what is absolutely necessary. not buy make and use to make sure thatLadies and Gentlemen, Today we are celebrating Earth Day. Earth Day is a day for reflection and action. Today, people in countries all over the world get together to discuss the earth and our future, and to take action to improve the current situation. Earth Day is a chance for us to learn about the world and change our behavior, it helps me understand that we must act. If I had known more about the earth in the past, I would have made different choices about what to do and what to buy. It is never too late to change. I am here today to talk about one of the most important problems we are facing. In my view, the most important challenge ahead of us is to find a way to protect the water on our planet. 75% of the earth is covered by rivers, lakes and oceans, so it is truly a water plane. Unfortunately, most of the water cannot be used for drinking. The earth is already becoming a thirsty planet, but there is still time to do something about the problem. If we want to have enough water in the future, we must learn to take better care of our water. We must stop polluting our water. We must learn to save water in our daily life.We should take better care of our water. Most of the fresh water on the earth is being used for farming. We use clean water to grow food. We need food, of course, but we must be more careful when we use our water. Too much water is being wasted because we are using old ways of watering our plants. We must solve this problem if we want to have enough water in the future. The best way to solve the problem is to use the knowledge and technology that some countries have already developed. If we work together and share what we know, we will be building a better future for all of us.We must stop polluting our water. Even if we succeed in making more water available to us, we must still do something about water pollution. We are polluting water at an alarming pace. Cars, factories, and air conditioners pollute the air and the water. We must change the way we think and the way we live. Lets nor drive if we can walk or ride a bike. Lets try not to use air conditioners more than what is absolutely necessary. Lets not buy products that cause pollution. Lets make new rules and use new technology to make sure that factories are green and clean. Keep in mind that we you and I are the ones who must change. This brings me to my final point: we must stop using too much water in our daily life.