九年级英语下册 Chapter 1 The green consumer课件 上海牛津版 课件VIP免费

- chapter 1(9B) Look and think• What is the name of the book that is reviewed?Who are authors?• The book is called a guide. What does this name suggest the book will do?• A consumer is anyone who buys and uses things. What do you think a green consumer is?• What do you think the main topic of the book is?• How many topics does the review cover?Environmentally friendly shoppers What are the threats to our environment?• The green effect• Damage to the ozone layer• Destruction of the rain forests• Pollution---Bad habits of…• Acid rain • Global warming The Greenhouse Effect• 1. There is atmosphere around the earth acting like the glass,letting sunlight in while keeping much of the warmth from getting out.• 2. The atmosphere is changing because we are polluting it with chemicals.• 3. The poisonous gases are mainly made up of Oxygen (O2) and carbon dioxide (CO2) .• 4. The greenhouse effect may cause the level of the sea to drop.TTFF Damage to the ozone layer• Ozone layer occurs _______ above the ground. It forms an essential ________ layer around the earth. Without it, the sun would burn us up. We are making ______ in the ozone layer mainly by using chemicals called ______. They are used in fridges and __________, and to make _______ items such as fast food boxes.20-50kmprotectiveholesCFCsspray cansplastic Damage to the ozone layer• What will the result be?Dangerous ultraviolet radiation （紫外线） from the sun will reach us, causing cancer and blindness, and destroying the food chain in the oceans. Destruction of the rain forests• What is making the Greenhouse Effect worse besides burning fuels? Why?• How harmful is it?The burning and cutting down of trees. Because trees take in CO2.It causes erosion of the soil and flooding, as well as destroying the people and animals who make the forests their home. Weather patterns will change and the earth will become warmer, melting the polar ice caps, raising sea levels and flooding coastal cities. Bad habits• Do you have any habits which cause pollution?• Do you have a habit of using things once and then throwing them away?• What does it create?• We know what to do with the rubbish, don’t we? How can we save the earth?• 1.What should we do with our rubbish?• 2. What kind of products should/shouldn’t we buy and use?• 3. What should we do to protect the rain forests?• 4. What should we do to solve the problems --- the Greenhouse Effect, damage to the ozone layer, global warming?(sort it out, recycle glass, plastic, paper and metal) (buy and use environmentally-friendly products which is less wasteful with paper and plastic)To be a green consumer How green are you?• Analysis• Score 0-8 You have not started turning green yet!• 9-14 You are pale green.• 15-20 You are medium green. Try harder.• 21-25 You are bright green, but do not stop trying.