(共24张PPT)
Learning objectives
Unit 6 Earth first
Starting out
Lead in &Vocabulary building
I
What problems are mentioned
Watch a video
What problems are mentioned in the video
Deforestation, loss of biodiversity(extinction), no clean drinking water, thinner ice caps.
What other environmental problems
are we facing nowadays
noise pollution
soil pollution
white pollution
What other environmental problems
are we facing nowadays
smog
extreme heat
(climate change)
ocean pollution
light pollution
Global warming
Vocabulary building: Dealing with global warming
Share what you know about these expressions.
A carbon footprint is the amount of greenhouse gases — primarily carbon dioxide — released into the air by a particular human activity. For example, when you drive a car, the engine burns fuel which creates a certain amount of greenhouse gases. When you heat your house with coal or electricity, you also generate greenhouse gases. Even the production of food and goods emits some quantities of greenhouse gases. Together these emissions make up a carbon footprint.
Vocabulary building: Dealing with global warming
Vocabulary building: Dealing with global warming
Complete the brochure with the expressions related to global warming.
Six things you can do NOW to help stop global warming
Reduce waste by choosing reusable products - get a(n) 1 _____________________,
for example.
reusable water bottle
Vocabulary building: Dealing with global warming
Complete the brochure with the expressions related to global warming.
Try to reduce your 2 ___________________. Walk or ride a bike instead of taking a car.
Use 3 _______________ such as solar energy and wind power.
The less energy you use, the less carbon dioxide is released. Replacing a regular light bulb with a(n) 4 _______________ is a great start.
carbon footprint
renewable energy
LED bulb
Vocabulary building: Dealing with global warming
Complete the brochure with the expressions related to global warming.
5 __________________ is important because clean water is a limited resource. Also, we use a lot of energy to process clean water.
Planting trees can help a lot in reducing the
6 ________________ because trees absorb the carbon
dioxide in the air.
Water conservation
greenhouse effect
Vocabulary building: Dealing with global warming
Discuss what we can do to help deal with global warming, using the words and expressions you have learnt.
Example:
A: I will ... to ....
B: I will ...when ....
...
Listening & speaking
II
Smog comes from the words “smoke” and “fog”, and it is used to describe the air pollution in cities caused mainly by traffic and factories. Smog can be dangerous because it causes severe breathing problems and infections.
Listening & speaking: Before listening
Do you know where the word “smog” came from
1. What the word “smog” means.
2. When the word “smog” appeared.
3. What caused smog in the past.
4. What causes smog now.
5. The effects of smog on the environment.
6. How governments try to reduce smog.
7. What will happen if we don’t reduce smog.
Listening & speaking: While-listening
Listen to the lecture about smog
and choose the topics that are covered.
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Listening & speaking: While-listening
Smog in the past
Term created in: 1. _______
Big problem in London: 2. _______________
in December 1952
Causes of the problem: burning too much coal
and 3. __________
Listen again and complete the slides on P89.
The Great Smog
1900s
no wind
Listening & speaking: While-listening
Smog in the present
Causes of the problem: 4. ________________________
and factories
Measures: rules about using 5. ________ in factories
and 6. ___________________________
in the city centre
chemicals
chemicals coming from traffic
requirements of paying to drive
Listen again and complete the slides.
More about Climate Change
What should we do to help the earth
measures
individuals
government
It’s high time we (did)...
It’s urgent to do...
It’s requested that sb. should do...
measures
It’s high time we led a green life. For example, we can choose carpooling, riding a bike or taking public transportation.
It’s urgent for us to set an example for those around us. In this way, more and more people will do their part in environmental pretection.
individuals
measures
government
It’s requested that government should make laws to protect environment.
It’s urgent for government to raise people’s awareness of protecting environment. For example, combine environmental protection with education, TV programs.
Make a summary:
What I have learnt in this class
Take action right now!