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Unit 2 Saving the EarthTopic 3 What can we do at home to protect the environment? Section D Grammar Functions What are the three R’s? Which means “make something less or smaller”? What should we reduce? Which means “use it again”? What should we reuse? What should we do about recycling? Throw the rubbish here and there. Don’t spit in a public place. Draw a beautiful picture on the public walls. Don’t throw things away if they can be reused. Go to school by bike instead of by bus. Collect the rubbish and try to sort it. Pour dirty water into rivers directly. Turn off the lights when you go out. How do you understand “Forests are the lungs of the earth”? Forests can remove carbon dioxide from the air and make oxygen. What difficulties do tree planters face when they plant trees ? (1)The weather may be very hot and dry or it may be very cold and wet. (2)There are often many insects that bite these planters on their legs, arms, and faces while they work. (3)They carry heavy bags of small trees, and working in the mountains can be dangerous. Why do they plant different kinds of trees ? They plant different types of trees so that birds and animals can live in the forests. What will happen if we do not plant new forests ? The forests will become less and less. We cannot breathe without them. Would you like to be a tree planter when you are older ? Why or why not ? … 5. How often do you use paper towels? Often. Seldom. Never. 6. How often do you eat fast food? Often. Seldom. Never. 7. What type of bags do you use for shopping? Baskets or cloth bags. Reused plastic bags. New plastic bags. 8. How often do you turn off the lights when you leave a room? Nearly always. Seldom. Never. Read 1a. Memorize the useful expressions and key sentences which we learn in this topic. Finish Section D in your workbook. Review what we learn in this unit. Thank
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