资源简介

(共46张PPT)
Section D
Factory pollution
Traffic
pollution
The ozone hole
More carbon dioxide
Fewer trees
Problem Effect on the environment
cars and buses pollute air, health problems
pollute land and water, rivers and lakes dead
harmful radiation reaches the earth, cause cancer
factory pollution
ozone hole
more CO2
greenhouse effect, the level of oceans rise, climate change
forests become deserts, animals and plants disappear
traffic pollution
fewer trees
Another serious problem is the shortage of water.
Nearly of the earth is covered with water.
three fourths
Although nearly of the earth is covered with water, we are still short of drinking water.
1a Read the passage and put the following paragraphs in the correct order.
( ) The sea seems to have the best answer. There is plenty of water in the sea. But we need to take the salt away from the sea water. This is very expensive. If scientists can find cheaper ways to do it, we can solve the problem of the shortage of water.
( ) How can we avoid a serious water shortage First, we should save water and not waste it. Second, we should protect our water resources and not pollute them. Third, we should discover ways to reuse water. Scientists have made some progress in this field. Today, some large cities are reusing their water. But people’s need for water is increasing day by day. We still don’t have enough water. What else can we do
( ) Although the world is hungry, it is even thirstier. While nearly of the earth is covered with water, we are still short of drinking water. This is because about 97% of the water on the earth is sea water. So we can’t use it for watering plants or drinking directly. Humans can only drink and use fresh water from places including rivers, lakes and underground.
1
2
3
1b Read 1a again and answer the questions.
1.Why is our world thirsty when of the earth
is covered with water
2. What can we do now to avoid the water shortage
3.What will be the best way to solve the problem in the future in the passage
4.Do you know any other ways to solve the problem What is it
1a Read and understand
Why are we short of water when
of the earth is covered with water
This is because about 97% of the water on the earth is sea water.
So we can’t use it for watering plants or drinking directly.
salt water
rivers, lakes and underground
Fresh water is only a little.
1b Read 1a again and answer the questions.
1.Why is our world thirsty when of the earth
is covered with water
Because about 97% of the water on the
earth is sea water, we can’t use it for
watering plants or drinking directly.
1a Read and understand
How can we avoid the water shortage
First, we should save water and not waste it.
Second, we should protect our water resources and not pollute them.
Third, we should discover ways to reuse water.
But people’s need for water is increasing day by day.
1a Read and understand
What else can we do
The sea seems to be the best answer.
We need to find cheaper ways of taking the salt away from the sea water.
1b Read 1a again and answer the questions.
2. What can we do now to avoid the water shortage
First, we should save water and not waste it.
Second, we should protect our water resources and not pollute them.
Third, we should discover ways to reuse water.
3.What will be the best way to solve the problem in the future in the passage
To find cheaper ways of taking the salt away from the sea water.
1a Read and understand
Although the world is hungry, it is even thirstier. While nearly of the earth is covered with water, we are still short of drinking water. This is because about 97% of the water on the earth is sea water. So we can’t use it for watering plants or drinking directly. Humans can only drink and use fresh water from places including rivers, lakes and underground.
thirsty – thirstier – thirstiest
渴求知识
be thirsty for knowledge
2. cover n./v.
大雪覆盖了地面。
The snow covered the ground.
The ground was covered with snow.
3. be short of
= have a shortage of
节约用水，否则我们很快会缺水。
Save water, or we will be short of water soon.
Save water, or we will have a shortage of water / water shortage soon.
How can we avoid a serious water shortage First, we should save water and not waste it. Second, we should protect our water resources and not pollute them. Third, we should discover ways to reuse water. Scientists have made some progress in this field. Today, some large cities are reusing their water. But people’s need for water is increasing day by day. We still don’t have enough water. What else can we do
4. avoid
为了避免错误，他亲自检查。
He checked by himself to avoid (making) mistakes.
为了避免撞到卡车，他来了个左急转弯。
To avoid hitting the truck, he made a sharp turn to the left.
5. discover
to find sth. which was hidden or unknown
第一次看到或找到前人没有看到的事物、现象或规律。
我发现他并不诚实。
I discovered him to be dishonest.
The sea seems to have the best answer. There is plenty of water in the sea. But we need to take the salt away from the sea water. This is very expensive. If scientists can find cheaper ways to do it, we can solve the problem of the shortage of water.
seem + adj. / to do sth.
it seems / seemed that
将海水里的盐分提取出来
take the salt away from the sea
避免水资源短缺
保护水资源
取得一些进步
在这个领域
一天天
被水覆盖
缺少饮用水
用它来给植物浇水
avoid a serious water shortage
protect water resources
make some progress
in this field
day by day
be covered with water
be short of drinking water
use it for watering plants
1a Read and understand
1.Pass laws against water pollution.
2.Collect and reuse waste water.
3. Remember to turn the tap off when you are not using water.
4. Make more people know the importance of saving water.
Do you know other ways to solve water shortage What is it
律师： lawyer
n.法律
3. Write a proposal about saving water to all the students in your school.
My dear friends,
Water is very important to human beings. Let’s do something to protect and save it.
First, ________ .
Second,_________.
Third, _________.
Let’s try our best to save water and our planet.
_____________
Grammar
Indefinite Pronoun and Adverb
_______of us likes pollution.
Don’t spit ___________ in public.
_________ should care for wild animals and plant more trees.
We should do ___________ we can to protect the environment.
None
anywhere
Everyone
everything
Functions
____a result（结果）, a lot of rich land has changed _____（变为）desert.
Trees can stop the wind from _________ the earth _____(吹走）.
We shouldn’t leave rubbish _________________ (到处).
All these problems are very serious,_____(所以) we must do something now.
into
blowing
away
here and there
so
As
I’m rubbish. _______ likes me, but
_________ makes me every day.
Many people throw me ___________,
this influences the look of our city.
I don’t like it. I wish people produce
as little rubbish as possible, because
dealing with me costs too much money
and takes up a lot of space. And don’t
throw me ________. Human beings should
do _________ they can to recycle me.
anywhere, nobody, everywhere, everything, everyone
Nobody
everybody
everywhere
anywhere
everything
Fill in the blanks.
1.We shouldn’t the tress because trees can clean air
and save a lot of water.
A. cut off B. cut out C. cut up D. cut down
2.-- Hi, Bob! I can’t find my history book.
Have you seen it
— Sorry, I haven’t. Why don’t you ask Jim
Perhaps he has seen it.
A. somewhere B. every where C. nowhere D. anywhere
3.Trees can prevent the wind the earth away.
A. from blowing B. to blow C. blow D. blows
4.— Oh, dear! Who made the wall so dirty
— Jack Martin. They were drawing on it just now.
A. Neither; nor B. Not; but C. Either; or D. Both; or
D
D
A
C
5.This kind of animals has nearly because their
homelands are gone.
A. died out B. died of C. died D. been dead
6.The driver was badly hurt of the traffic accident.
A. at a result B. in the result
C. with the result D. as a result
7.You made many mistakes in your English exams.
What will you them
A. help with B. do with C. take with D. bring with
8.You’d better not read today’s newspaper because
there is in it.
A. something interesting B. nothing special
C. important thing D. anything new
9. trees are planted in our city every year.
The millions of B. Million of
C. Millions of D. Million
A
D
B
B
C
( ) 10. Remember this, boys and girls. careful you are,
mistakes you will make.
A. The more; the more B. The fewer; the more
C. The more; the fewer D. The less; the fewer
C
1.My friend (change) in many ways during
the past four years.
2. It’s our duty (protect) the environment.
3. Mr. Black is one of (produce) about MP4.
4. None of them (pass) the exam.
How sad they are!
5.The (important) of this problem has not
been known.
has changed
to protect
producers
has passed
importance
6.不要到处吐痰。
Don’t _____ _____ and _____.
7.森林有利于防止水土流失。
Forests help to keep water _____ ___________ the earth away.
8.我们应该尽一切努力保护环境。
We should do _____ _____ to protect the environment.
9.大量良田变成荒漠，遍地是沙子。
A lot of rich land has __________________ into desert, _________ only sand.
spit here there
from washing
our best
changed/turned
leaving
My dear friends,
Water is very important to human beings. Let’s do something to protect and save it.
First, we should protect our water resources and not pollute them. The government should also pass laws against the water pollution.
Second, we should save water in our daily life. We should turn off the taps in time. Take a shower instead of taking a bath and always remember to collect and reuse water.
Third, let’s try to spread the message about protecting and saving water. Make more people around us know the problem of water shortage and how to help solve it.
Let’s try our best to save water and our planet.
Student Union
My dear friends,
As we all know, water is very important to humans.
However, we are short of drinking water now. There are two reasons for it. First, about 97% of the water on the earth is sea water, so we can’t use it for watering plants or drinking directly. What’s worse, some things we have done are harmful to water. People have polluted the water.
In my opinion, we should do something to protect and save water. First, we should save water and not waste it. Remember to turn off the tap when we leave. Second, we should protect our water resources and not pollute them. The government must pass laws against water pollution. Third, we should discover ways to reuse water. We can collect waste water and reuse it in other ways.
In a word, water is very important in our daily life. We should do everything we can to protect and save it.

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