unit 9 the first period[上学期]

课件42张PPT。Unit 9 Saving the earthWhy is she crying?Why is she so sad?Have we done something bad to her?DiscussHelpWhat problems are mentioned in the video?The water is seriously polluted.Can you imagine that this is the water they drink everyday? Waste from factories and cities should be stopped. We can use new technologies to deal with the waste water. We should also be more careful with our water, try to use less and recycle as much water as possible.Air pollution Waste from factories and cars should be stopped. We can reduce air pollution by using new technologies and using less energy. The harmful smoke should be made harmless before it goes into the air. More trees should also be planted.solar energypoor sanitation We can reduce the amount of garbage/rubbish by producing and buying products that use less packaging or wrapping. We should never throw garbage in the streets or in nature. We should also try to recycle as much as possible.desertThe area of desert is growing. desertificationWhy is more and more land becoming desert?
Dunhuang
Gebi A great cityWhy?two causes:A desert(China)too many sheep and cattleall the grass be eaten grass never grow again ; the land become desertTrees are cut down. If our land turns into desert, we won’t be able to grow enough food. That may cause starvation. Desertification is mainly caused by deforestation and changes in climate. It can be reduced if we try to “repair” desert and protect areas that are in danger of becoming desert.desertificationMany forests have been destroyed.deforestationwhat will happen after the trees are cut down?
trees be cut downnothing to hold…soil be blown awaysoil be washed into…deforestation Our need for wood and fuel cause deforestation, which in turn leads to desertification. We should make strict laws to protect the forests. We can reduce the effects of deforestation by planting new trees and we can also try to use less wood.one-offStarvation(hunger) and poverty Starvation is mainly caused by the uneven distribution of wealth and sometimes by war or natural disasters. We can reduce starvation by redistributing the wealth of rich countries, by providing education and technology to developing countries, and by giving monetary aid to disaster-stricken areas.overpopulationMany precious animals are killed and dying out.What is the biggest problem facing the earth?why do you think so?What should we do and not do to save our earth?thinkingPair workUse one-off chopsticks , lunch-boxes and cups.When sneezing, use paper tissue instead of a handkerchief. Don’t throw rubbish at will.Use as much water as we like since we pay for it. Don’t waste electricity. Wear coats made of fur for they are beautiful.
Build more and more houses on farmland.
Plant trees around your house.

Don’t destroy trees and grass.Use fridges and air conditioners to keep cool.HelpWe have only one earth !!!Save our earth, save ourselves!! Return GREEN to the earth!!
Listening1. 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 2
Outline the speaker’s arguments.
Argument 1: we should ______________________.
We must ________________________.
We must ___________________________________.
If we _____________________, we ____________.take better care of our wateruse…technology…to solve the problem.work …and share…… careful …Argument 2:___________________________.
Problem:______________________________ _______________________________________.
Solutions: __________________________________________.
__________________________________________.
__________________________________________
__________________________________________.
____________________________________________________________________________________.We must stop polluting our water…polluting …at an alarming pace.…pollute the air and the water① …change the way…② …not drive…③ …try not to …more than what is absolutely necessary.④ …not buy…⑤ …make …and use …to make sure that…discussion What’s your attitude towards
burning a lot of coal ?
Work in groups of four, including a businessman, an environmentalist, a scientist and a local citizen.You think that we should burn the coal because…You don’t think we should burn the coal because…You think that we should spend more money on science so that…We must burn the coal so that we can get money to develop our area…which do you think is the most serious problem?air pollutionwater pollutionpoor sanitationpovertydeforestationdesertification
It’clear that …I’m all for …(赞同)I can’t imagine that …I believe that
we must …If nothing is done…,then …It would be better if we …Is there a better way to …?Sure /
Certainly/
absolutely