资料简介
Unit 3 Environmental
Protection
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Leading-in
While-class
After-class
Part.1 Leading-in
Leading in
What is the graph about? What information can you get fro
m it?
Leading in
Have you ever seen the photo before? What might be the
story behind it?
Leading in
• What happened to the polar bear？
• How do you feel when you see the photo？
• What do you think might have caused the polar bear's
death？
• Do you think it is related to the global temperature
rise？
Part.2 While-class
While-class
阅读全文，找出每一段的主题句，划分文章结构
Part Paragraph Main idea
1 1-2
The evidence of dramatic climate change that had an
impact on Earth's ecology
2 3
The cause of the increase in the global average surface
temperature
3 4 The consequences of the rise in temperature
4 5 The solutions to reducing greenhouse gas emissions
While-class
Part 1
Para 1
introducing the topic
a dramatic change in
the global climate
the reason for its
death
Para. 2 finding a
dead polar bear Global warming affected Earth'
s ecology.
While-class
What happened to the polar bear in the photo? Why did the
writer write about it?
The polar bear died from lack of food.
The writer wrote about it to show how the increase in
temperature had an impact on Earth's ecology.
While-class
• What evidence of climate change can you find in these
two paragraphs？
• What is the author's purpose of using the graph and the
photo？
• Can you use your words to describe how climate
change have influenced the polar bears life？
While-class
Para. 3 reasons for
the increase in
temperature
the"natural“
greenhouse effect
the"man-made" greenhouse
effect-producing huge
amounts of extra greenhouse
gases
While-class
• Why is the “natural ”greenhouse effect important and
necessary？
• What are the consequences of high greenhouse gas emissions?
• Because greenhouse gases in the atmosphere trap some of the he
at, keeping Earth's climate warm and habitable. Without this
process, Earth could not sustain life.
• More heat energy is trapped in the atmosphere, which causes
Earth's surface temperature to rise quickly.
While-class
Diagrams are very useful tools that can be used to brainstorm
ideas, map out processes, show cause and effect relationships,
explain a new idea or concept, and so on. When you read an
essay about scientific issues, you can try drawing a diagram,
which will not only allow you to visualise the problems more
clearly but also can help demonstrate your creative thinking and
problem-solving.
While-class
While-class
Para. 4 results of the rise
in temperature
an increase in extreme weather and n
atural disasters worldwide
climate scientists calling on peopl
e to take appropriate
actions
While-class
Why did the author mention the climate scientists' warning?
Because the warming trend will cause great damage to human
beings.
While-class
Para. 5 how we react
Governments need to make
policies and take measures
to reduce greenhouse gas
emissions.
Individuals restrict the amount of ca
rbon dioxide their
lifestyles produce.
While-class
What is the author's purpose of writing this text?
To attract the attention of people all over the world to focus
on climate change and take actions to reduce greenhouse gas
emissions and the carbon footprint.
Part.3 After-class
After-class
1 What examples of extreme weather and disasters do you
know? Can you make a list?
2 Do you think climate change is the result of human
activity? Give your reasons.
3 Who do you think should take responsibility for dealing
with climate change? What can we do?
Thank you!
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