UnitOneLead-in补充资料.ppt

Unit One Lead-in 补充资料,Some alarming facts,One-third of the worlds people dont have enough clean water. Two-thirds of the worlds ocean coastlines are polluted. Chemicals have destroyed ten percent of the ozone layer over Europe and North America. Each year, people ruin or cut down nearly 143,000 square kilometers of forest. Every day, Americans and Canadians create about 1.8 kilograms of garbage per person.,More helpful words for your reference,The ocean are being polluted by industrial waste. Fish supplies have been depleted through overfishing. Automobile pollution has lowered the air quality in most major cities. Air pollution is threatening the health of older people and children. Livestock farms have contaminated soil and underground water. The burning of gas, oil, and coal has created acid rain which is damaging forests and life in rivers and lakes.,More helpful words for your reference,The cutting down of rain forests is destroying rare plants and wildlife. The growth of cities has eaten up huge amounts of farmland. Poverty and overcrowding are ruining the lives of people in many cities. The use of CFCs (chlorofluorocarbon 氟氯化碳) in products like hair spray has created a hole in the ozone layer. And the reduction of the ozone layer has caused many more cases of skin cancer.,Assignment 1 for each of you,Find Inconvenient Truth on with Chinese or English scripts. Find the following videos on . Let the Environment Guide Our Development 4 Environmental Heresies My Wish: Manufactured Landscapes and Green Education My Green school Dream The Science behind a Climate Headline Why I must speak out about climate change Morekey word: environment, development,Assignment 2 for eight of you,Presentation Caring for Our Earth Global Warming Debate Developed Countries Have a Higher Obligation to Combat Climate Change Than Developing Countries,Discuss the following topics with the help of the pictures.,Heated .,Sweating!,Why is the Earth sweating and steaming? Do you want to join the crowd standing by and watching, or to do something to help her?,According to scientists, the satellite data confirm the Earth has had an increasing “fever“ for decades because carbon dioxide and other air pollution have been trapping the suns heat and causing the Earth to warm up, sweat and steam. Global warming is really a big problem we have to deal with nowadays, because it has the potential to change forever our lives and our planets environment, and this would affect the whole mankind.,So we couldnt just stand by and watch. We dont need to wait for governments to find a solution for this problem. Each individual can bring an important help adopting a more responsible lifestyle. For example, choose energy efficient appliances when making new purchases; defrost old fridges and freezers regularly; cover your pots while cooking and the like.,Discuss the following topics with the help of the pictures.,How do you dispose of tin cans, plastic bags, and used batteries? Do you know anything about garbage sorting and recycling?,Sorting and Recycling!,Mixed Garbage Overflowing,While tin cans could be recycled, plastic bags and used batteries could not, so we should not mixed them together. As we know, when different kinds of garbage are mixed together, pollution increases while the reusable value of rubbish decreases. Therefore, residents should separate organic material from the rest of the garbage, separate wet kitchen material from the dry, and sort out plastic bags and hazardous waste.,Garbage sorting involves a lot, and providing recycling bins on the street is just a first step. Waste collectors also pick out useful items such as metals, glass, paper and plastic from discarded trash. But some major problems remain. Take plastic bags, for example. They not only take a long time to degrade, but their presence can influence the degrading of other waste materials. So it is very important for peop