课件22张PPT。Modern Man and the EarthUnit Four Lesson Two ReadingA promotion on environmental protection★What have we done to the earth?
★ What are the bad effects?
★ What do you suggest we should do?
People have done bad things to the Earth.T/F for paragraph 1The history of the earth is less than 4 billion years.
Modern man has lived on it for only 30,000 years.
People do both good and bad things to the earth.FFTmore35,000Questions for Paragraph 2,3,4In big cities ,what has polluted the air ?
Cars , buses and factories.
What have factories polluted?
The land, the air and the water.
Have many rivers and lakes become very dirty?
Yes ,they have.
How many trees have been cut down by people?
Millions and millions of trees have been cut down.
ListeningWhat are the problems
in big cities?
ABCDEEIn big cities:Cars &. busesFactoriesD____ &. D__ water.Health problemsirtyeadWhat are the problems in big cities?
Para 2What do people do to forests? Para 3Cutting down trees?What do people do to forests?
Cutting down treesMany animals are in danger and the quality of the air has become worse. At the same time , people burn oil, coal and wood. The dirty air has formed a “blanket” around the earth. The heat from the sun cannot escape, so the air temperature is rising. This is calledthe greenhouse effectThis means that the level of the sea is rising
and the climate is changing.Paragraph 4What is the greenhouse effect ? What is the result of the greenhouse effect? the Greenhouse effectPeople burn oil, coal and wood.?Paragraph 4Greenhouse effectPeople burn oil, coal and wood.The rising sea level.The changing climate.Fill in the blanks according to paragraph 2,3,4 : pollutedbadhealthproblemsriverslakeslandairwatercutdowntreesindangerworsecoaloilwoodgreenhouseeffectThings We Can Do To Protect The Environment1.Be _______ ________
2.Only buy and use things that ______ ______ ______ the environment.
3.Get rid of habit of using once and then ______ ______ _______greenconsumersdonot damagethrowingthemawayParagraph 5Some Measures Taken by Countries to Improve the Environment(部分国家改善环境采取的措施)
1.Use the wind ,the sun and the sea to _______ ________.
2.Do not allow people to ______ _______ on certain days.
3.Use _______ cars and buses.makeelectricitydrivecarselectricParagraph 5['me??] [i'lektrik]Retell the passage Modern Man and the
Earth…has lived on the earth for…
…good things and bad thingsbad thingsgood thingsin big citiescars , busespeople bad health problemsfactoriesrivers, lakes;
dirty, deadall over the worldtreesanimals ,dangerat the same timegreenhouse effectthe level of sea, climateWe can do …Some countries have doneget rid of, damagemake electricity
drive cars….People have done bad things to the Earth.
In big cities.
Problems: In forests--to animals.
Greenhouse effect.
What should we do ? We should take action now to protect the earth.Topic sentence---main idea
Details support
conclusionsummarize
What can we do to protect our earth?Suppose the World Environmental Day is coming and our class is going to have a English Speech Contest on what we can do to protect the environment. DiscussionLet's build a green earth!Assignment Write a composition of at least 60 words on the topic “Protect Our Environment”. The outlines are for your reference only. (以“保护我们的环境”为题写一篇不少于60词的短文，以下提示供参考。)
Is it necessary for us to protect the environment?
Why or why not?
What must we do to protect the environment?
Students’ Paper
I. Fill in the blanks according to paragraph 2,3,4 :
Bad Things
Bad Effects
In the
big cities
cars and buses have ______ the air.
factories have polluted the ______,the ________and the ________.
many people have got______ _______ _______ .
_______ and ________ have become dirty or even dead.
All over
the world
people have _______ ________ millions and millions of _______.
animals are _______ ________ and the quality of the air has become_______.
At the
same time
people burn _______,_______ and __________.
This has caused the _________ __________.
II. Read the paragraph 5:
Things We Can Do To Protect The Environment
Be _______ ________
Only buy and use things that ______ ______ ______ the environment.
Get rid of habit of using once and then ______ ______ _______
Some Measures Taken by Countries to Improve the Environment
Use the wind ,the sun and the sea to _______ ________.
Do not allow people to ______ _______ on certain days.
Use _______ cars and buses.
