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1、Why?,The earth has suffered from many environmental problems.,Remains of Loulan,desertification,What kind of environmental problems can you list out?,It was gradually covered over by sandstorms.,Task - Designing a poster,Task 1 Listen to a lecture,Task 3 Design a poster about desertification,Task 2
2、Read a scientific article,Task 1,Listening,Desertification happens when land that can be used for farming turns into desert. It affects _ people every year. About _ of all the Earths land suffers from this problem. Although desertification can happen everywhere, it is an especially big problem in Af
3、rica and parts of _. It is a problem in _ as well. Even people who do not live in the desert areas can be affected, because the sand from the deserts gets carried by the wind to other areas. It is not very healthy to _ the dusty air.,Listen to a lecture about desertification and fill in the gaps.,It
4、 is worse for the people who live in the desert areas. They may lose their homes and farms because the land is too dry to use. Many families _, and others move to cities to find work. There are many _ why this is happening. Some parts of the world are becoming drier because the weather has changed.
5、However, the _ of humans are making the problem of desertification _. People plant too much on the land _ giving it a rest; too many animals _ the same land for food; and people cut down trees for energy and to _ more farms-all of this dries out the land. When it gets too dry and there are no trees
6、to stop the wind, the soil _. Desertification is _ problem. You can help _ this problem by educating people in your community and round the world.,Desertification happens when land that can be used for farming turns into desert. It affects _(1)_ people every year. About _(2)_ of all the Earths land
7、suffers from this problem. Although desertification can happen everywhere, it is an especially big problem in Africa and parts of _(3)_. It is a problem in _(4)_ as well. Even people who do not live in the desert areas can be affected, because the sand from the deserts gets carried by the wind to ot
8、her areas. It is not very healthy to _(5)_ the dusty air.,around 250,000,000,a third,South America,China,breathe,Check your answers,It is worse for the people who live in the desert areas. They may lose their homes and farms because the land is too dry to use. Many families _(6)_, and others move to
9、 cities to find work. There are many _(7)_ why this is happening. Some parts of the world are becoming drier because the weather has changed. However, the _(8)_ of humans are making the problem of desertification _(9)_. People plant too much on the land _(10)_ giving it a rest; too many animals _(11
10、)_ the same land for food; and people cut down trees for energy and to _(12)_ more farms-all of this dries out the land. When it gets too dry and there are no trees to stop the wind, the soil _(13)_. Desertification is _(14)_ problem. You can help _(15)_ this problem by educating people in your comm
11、unity and round the world.,starve,reasons,actions,much worse,without,depend on,make space for,blows away,everyones,solve,More questions about desertification,1.How many people are affected by desertification every year? 2.Where does it happen?3.How are the people living in desert areas are affected?
12、4.Why does it happen?5.Who should be concerned?,around 250,000,000 people, in Africa South America in China,lose their homes and farms starvemove to cities,the weather has changedthe actions of humans plant too much too many animals cut down trees,everyone,desertification,Desertification is everyone
13、s problem. You can help solve this problem by educating people in your community (社区) and round the world.What specific measures have been taken to solve it?,fences,trees,research,administrate,Train,Share,satellites,crops,desert,Task 2,Reading a scientific article,Helpful expressions:I think/believe
14、 thatFrom my point of view it seems thatIt seems to me thatPersonally I agree/disagree becauseIn my opinion/view,As far as I am concerned,As far as I know,On my part,eg: As far as I am concerned, persuading people to walk or ride bike instead of driving cars can help stop desertification, because ca
15、rs give out greenhouse gases.,What can we do to help stop desertification?,Task 3,causessolutionsSlogans(口号) ,Designing a poster,Who?,Homework,Group work: improve the poster Individual work: preview Project,Thank You !,Task 3,Designing a poster,Content,attractive & brief,present situation causes solutions slogans ,Drawing conclusions,Sometimes all the information you need about a subject is not included in what you hear. This is when you must draw a conclusion.eg: A: The train is going to be late today.B: Im not surprised.We can conclude that the train is often/seldom later.,
