人教版（新课程标准）选修六Unit 4 Global warming复习课件（18张PPT）

(共18张PPT)
Review
Unit 4 Global warming
Review
1
2
3
Vocabulary revision
Sentence revision
Topic revision
During the 20th century the temperature
of the earth _____ about one degree.
The carbon dioxide in the atmosphere
__________ from around 315 parts to
around 370 pearts per million.
rose
went up
a phenomenon----- global warming
human activities
How did it come about
a random and natural
phenomenon
or
There is no doubt that it is human activity that has caused this globlal activity rather than a random but natural phenomenon.
There is (some) doubt whether ...
I doubt whether...
review
it is/ was + 被强调部分+ that / who...
it is / was not until... that...
human activities
the burning of _____ _____ like coal, natural gas and oil
more ____________ gases, the most
important of ______ is carbon dioxide.
deforestation
less carbon dioxide
will be ______
____________ of
trees are being cut
down by people.
fossil
fuels
greenhouse
which
absorbed
quantities
The _______ of three scientists ______ the rise
are ____________ different.
Janice Foster
Charles Keeling
George Hambley
These two scientists________ _____ the view that global warming will lead to a _________ while George Hambley is _________ _____ the opinion.
atitudes
towards
completely
subscribe to
catastrophe
opposed to
How to state others' opinions
about a problem
He believes/ thinks/ that...
He holds ____ ____________ that...
There are those_______ , like sb. , are opposed to the view that...
There are those_______ , like sb. , subscribe to the point that...
He thinks that..., others who agree with him believe that ...
approve of the idea believe that...
review
the opinion/view
who
who
snow melt
drought
flood
coastal cities will be
submerged
It is time for us to take measures to fight against
global warming.
It is time that ____ ______ take measures to fight
against global warming.
It is time that we ______ measures to fight against
global warming.
review
是该做......的时候了。
we should
took
Together, individuals can .
make a difference
a group work:
Discuss with your classmates and figure
out what we can do to fight against global
warming in our daily life.
some good ideas:
◆ 1. Turn off electrical appliance if not using.
◆ 2. Walk or ride a bike if you can.
◆ 3. Recycle cans, bottles, plastics and newspapers. If you can, buy things made from recycled materials.
◆ 4. Get your parents to buy products that are economical with with energy.
◆ 5. Plant more trees.
◆ 6. Finally and most importantly, be an educator. Talk with your family and friends about global warming.
Ouyang Guang
one person
a magazine
two letters
Earth Care
Invitation
Dear Ouyang Guang :
In order to raise people's awareness of protecting
environment, our magazine intends to host a speech competition
with the topic of “ how to fight against global warming ”. We
sincerely invite you to take part in the competition on behalf of
your school.
Yours,
Earth Care
some good ideas:
◆ 1. Turn off electrical appliance if not using.
◆ 2. Walk or ride a bike if you can.
◆ 3. Recycle cans, bottles, plastics and newspapers. If you can, buy things made from recycled materials.
◆ 4. Get your parents to buy products that are economical with with energy.
◆ 5. Plant more trees.
◆ 6. Finally and most importantly, be an educator. Talk with your family and friends about global warming.
Transitional expressions:
In the first place; First and foremost; To begin with; Then; Also; Secondly; Besides;
Moreover; Furthermore; Meanwhile
In addition; Additionally; What is more;
Finally and most importantly; Last but not least...
To be clearer and better-organized
To be more polite and convincing
Useful sentence patterns:
Why not do ... /Why don't you do...
It would be a good idea if ....
I think it would be more beneficial if you could..
If I were you, I would...
I would like to recommend/suggest that...
Homework
Polish your speech draft and hand it in.