资源简介

(共34张PPT)
Unit 3
Environmental Protection
Reading and Thinking
1. What can you see in the picture
2.What is the cause of this phenomenon
Lead-in
A large piece of ice is breaking off a glacier.(The ice is melting)
Global warming
What other consequences of the global warming
economic losses
the rise of sea level
dying animals
natural disasters
extreme weather
coastal cities
submerged
Lead-in
Look at the graph. What is it about What information can you get from it
What can you see in the photo
What might be the story behind it
The temperature of the global surface rose about 1.2 ℃ from 1920 to 2016. The earth is becoming warmer and warmer.
skin and bones
瘦得皮包骨
The polar bear (北极熊) may died for lacking food.
Before-reading
While-reading
1. What is the type of this passage
A. Argumentative writing议论文
B. Narrative writing叙述文
C. Expository writing说明文
D. Advertising writing广告
2. In which part of a newspaper or
magazine may we find this passage
A. Entertainment B. Economy
C. Education D. Environment
While-reading
Part 1:
(para.1-2 )
Part 2:
(para. 3)
Part 3:
(para. 4)
Part 4:
(para. 5)
The evidence(证据) of dramatic climate change that had an impact on Earth’s ecology
The causes(原因) of the increase in the global average surface temperature
The consequences(结果) of the rise in temperature
The solutions(解决方法) to reducing greenhouse gas emissions
Match the main idea with each part.
Reading for the details (Para.1)
A problem
What
Evidence
a warming ocean & atmosphere
melting ice
rising sea level
Climate’s is getting warmer and warmer
CLIMATE CHANGE REQUIRES THE WORLD‘S ATTENTION
气候变化需要全世界的关注
We have known about climate change for decades(数十年). There is little doubt that(毫无疑问) Earth is getting warmer and warmer（越来越暖） (see the graph). A warming ocean and atmosphere along with(与...一起) melting ice and rising sea levels provide evidence of(提供...的证据) a dramatic change(巨变) in the global climate(全球气候).
(Para.1)
我们了解气候变化已有数十年了。毫无疑问，地球正变得越来越暖和（见图表） 海洋变暖和大气变暖以及冰川融化和海平面上升是全球气候的急剧变化的证据。
Reading for the details(Para.2)
climate change
starvation
longer
food-seeking travel
lack of food
low sea-ice level
The following reasons account for the death of the polar bear, with one influencing another. Read paragraph 2 and put them in a correct logical order.
What is the root cause
In 2013, a lot of people were shocked by(对...感到震惊) a news photo of a dead polar bear that(引导定从) was found on Norway’s Arctic island of Svalbard. According to the scientists who(引导定从) found its dead body, all that(引导定语从句) remained of the polar bear was “skin and bones(瘦得皮包骨，瘦骨嶙峋)”. An expert who(引导定从) has studied polar bears for many years said that (引导宾从)from the position(姿势) of its dead body, the bear appeared to(看上去好像) have starved(v.挨饿; adj.starving) and died.
to have starved 不定式的完成时，表示先于谓语动词发生的动作
(Para.2)
2013年，一张在挪威北极地区的斯瓦尔巴群岛上发现了一只北极熊尸体的新闻照片让很多人震惊。根据发现这只北极熊尸体的科学家的说法，这只北极熊只剩下“皮包骨头”了。 一位研究北极熊多年的专家说，从它尸体的位置看，这只熊似乎是饿死的。
Experts claimed(专家称) that (引导宾从)low sea-ice levels caused by climate change(过去分词短语做后置定语) meant the bear could not hunt seals(捕食海豹) as before, so it had to travel greater distances in order to(为了) find food. This alarming case(惊恐的案例) showed how the increase in temperature had an impact on(对...有影响,influence, effect) Earth’s ecology(生态).
专家称，由于气候变化造成的海冰水位较低，这只熊无法像以前那样捕猎海豹，所以他为了找到食物不得不去更远的地方。这一令人震惊的案例表明气温升高对地球生态产生了怎样的影响。
Reading for the details (Para.3: cause)
natural
man-made
Definition
Heat from the sun enters the __________ and warms Earth’s __________ as _________-wave radiation.
Function
Keeping Earth’s warm and_____________
Definition
People produce huge amounts of_________ greenhouse gases by burning_____________.
A big problem
More ________ energy is trapped in the atmosphere and causes Earth’s surface temperature to ________ quickly.
habitable
extra
fossil fuels
atmosphere
surface
short
heat
rise
Greenhouse Effect
Greenhouse effect
“Natural” greenhouse effect
“man-made” greenhouse effect
Reading for the details (Para.3: cause)
Then what is causing the increase in the global average surface temperature(平均地表温度) Climate scientists often mention a key(关键的) climate process called the “greenhouse effect”(过去分词短语做后置定语), which(引导非限定) has two common meanings: the “natural” greenhouse effect and the “man-made” greenhouse effect.
那么是什么正在导致全球表面平均温度的上升呢？ 气候科学家经常提到一个被称为“温室效应”的关键气候过程，它有两个普遍的含义：“自然”温室效应和“人为”温室效应。
The “natural” greenhouse effect refers to the fact that(引导同位语从句,解释说明fact的具体内容) heat from the sun enters the atmosphere and warms Earth’s surface as short-wave radiation(短波辐射). The heat is released(释放) back into space at longer wave lengths(波长).
“自然”温室效应指的是来自太阳的热量进入大气层，并以短波辐射的形式使地球表面升温。热量以更长的波长释放回太空。
Greenhouse gases in the atmosphere, such as methane(甲烷) and carbon dioxide(二氧化碳), trap some of the heat(困住/吸收热量), keeping(现在分词短语做结果状语) Earth’s climate warm and habitable(适宜居住). Without this process, Earth could not sustain(维系) life. However, the “man-made” greenhouse effect has now become a big problem.
大气中的温室气体，如甲烷和二氧化碳，会吸收一些热量，使地球气候保持温暖和适宜居住。没有这个过程，地球就无法维持生命。然而，“人为”温室效应现在已经成为一个大问题。
When people produce huge amounts of (大量的)extra(额外的) greenhouse gases by burning fossil fuels(化石燃料), more heat energy is trapped in the atmosphere and causes Earth’s surface temperature to rise quickly.
当人们通过燃烧化石燃料产生大量额外的温室气体时，更多的热量被困在大气中，导致地球表面温度迅速上升。
Reading for the details (Para.4: consequence)
1. What are the consequences of the global temperature rise
2. Why did the author mention the climate scientists’ warning
The rise in the temperature
extreme weather & natural disasters
extreme rainstorms, heatwaves
serious damage, costing human lives
led to
Because global warming needs everyone’s attention and it is essential that we take appropriate actions.
examples
results
There is strong(有力的) and comprehensive(全面的) evidence that(引导同位语从句,解释说明evidence的具体内容) the rise in temperature has led to（lead to导致） an increase in extreme weather(极端天气) and natural disasters(自然灾害) worldwide, not only causing(导致) serious damage, but also costing(使损失，丧失) human lives.
有力且全面的证据表明，气温上升已导致世界范围内极端天气和自然灾害的增加，不仅造成严重的破坏，而且还致人丧命。
There is evidence that...有证据表明
Climate scientists have warned that if(that引导的宾语从句本身又是一个主从复合句，if条件句用现在时表将来) we do not take appropriate actions(采取恰当措施), this warming trend(变暖的趋势) will probably continue and there will be a higher price to pay. In fact, news reports are frequently broadcast（播送） about extreme rainstorms(极端暴风雨) and heatwaves(热浪) causing(现在分词短语作后置定语) deaths and economic losses经济损失.
气候科学家警告说，如我们不采取适当的行动，这种变暖的趋势可能会继续下去，并将使我们付出更高的代价。事实上，新闻报道经常播送造成死亡和经济损失的极端暴雨和热浪。
Continued greenhouse gas emissions(排放) will result in导致 further warming and long-lasting changes to the global climate全球气候. This requires the attention of people all over the world全世界. Governments need to consider(考虑) making policies制定政策 and taking appropriate actions and measures to(+do 采取措施做某事，不定式短语作目的状语) reduce greenhouse gas emissions.
Reading for the details (Para.5: solutions)
持续的温室气体排放将导致全球气候进一步变暖和引发长期的变化。这需要全世界人民的关注。各国政府需要考虑制定政策并采取适当的行动和措施来减少温室气体排放。
We as individuals个人 can also reduce our “carbon footprint(碳足迹)” by restricting the amount of（...的数量） carbon dioxide our lifestyles produce(省略关系代词that或which的定语从句). It(形式主语) is our responsibility to(动词不定式短语作真正的主语) seize every opportunity(抓住机会) to educate everyone about global warming（全球变暖）, along with its causes and impacts, because this is the most serious issue affecting影响(现在分词短语作后置定语) all of us on this planet. So what will you do to help
作为个人，我们也可以通过限制生活方式产生的二氧化碳的量来减少我们的“碳足迹”我们有责任抓住每一个机会，让每个人了解全球变暖及其原因和影响，因为这是影响我们这个星球上所有人的最严重的问题，那么你会怎么做呢？
Reading for the details (Para.5: solutions)
solutions
governments
make policies
take appropriate actions and measures
individuals
reduce our “carbon footprint” by…
educate everyone about global warming
Discussion
1.What examples of extreme weather and disasters do you know Make a list of them.
2. Do you think it is human activity that caused global climate change Give your reasons
Tsunami(海啸） flood（洪水） landslide（滑坡）
sandstorm（沙尘暴） thunderstorm（雷雨） earthquake
hail（冰雹） heatwave（热浪） cold wave（寒潮）
typhoon（台风） tornado(龙卷风).
Yes. Human beings burn too much fossil fuels and produce large quantities of carbon dioxide, causing the temperature to go up steadily .
Activity4:Group discussion
Go to school or work by bike /bus instead
of driving a car.
What will you do to help
Use a handkerchief instead of tissues
What will you do to help
Use reusable baskets or eco-friendly bags instead of plastic bags; buy things economic with energy; use recyclable goods or items.
What will you do to help
Turn off the lights and fans when leaving
Less tissue, regain handkerchief
forest protection
Turn off light, switch, pull the plug if not use.
plant trees
How do we live a low-carbon lifestyle
walk or cycle to work
Homework
1.Summarize the whole passage by drawing a mind
map and figure out what writing techniques the author uses in the passage.
2.Make a poster about how we can do to balance our
needs and sustainable nature.

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