文档介绍：Unit 13
Focus on Global Warming
Teaching Objectives
To get students know the causes and effects of global warming so as to improve their awareness of environmental protection for survival.
2. To understand the purpose of writing anization of the text.
3. To reinforce some basic linguistic knowledge by doing various types of exercises.
Discuss
List some examples of environmental pollution in daily life.
What do you find in weather? What are the reasons for weather change?
I. About the text
1. What is the purpose of this writing?
II. Structural Analysis
The first part (Para 1 to 2): Introduction
The author mentions how global warming has e a matter of increasing public concern.
The second part (Para 3 to 8)
The author introduces the causes leading to the global warming.
The third part (Para 8 to 10)
The author brings out his suggestions—what to be done to slow global warming.
The fourth part (Para 11): Conclusion
The author invites the participation of everybody bat global warming and to “make a real difference”.
Some terms
Carbon dioxide
Methane
Nitrogen
Nitrogen oxide
ozone
III. Some difficult words, phrases and sentences
With the possible exception of another world war, a giant asteroid, or an incurable plague, global warming may be the single largest threat to our .
Explain: Global warming will probably be the most serious threat to our Earth, if we do not take into account some other possible incidents, such as another world war, collision of our Earth with some large orbiting s, or spread of incurable diseases.
III. Some difficult words, phrases and sentences
2. As far as human health is concerned, those hit hardest will probably be residents of poorer countries that do not have the funds to fend against changes in climate.
Explain: In terms of human health, it is those who live in the poorer countries that will suffer most, because they do not have money to protect themselves against climate changes.
3. Vulnerable
His wife’s death le