(共26张PPT)
Listening and speaking
Unit 6 Earth first
By the end of this class, the students can
1. Select the topics the lecture covers after listening;
2. Note down the causes, effect and control measures in the past and present by listening;
3. Talk about another environmental problem in a similar conversation.
Learning objectives
Dealing with global warming
Global warming
What environmental problem does this cartoon refer to
What do you know about global warming
＊Global warming is the long-term warming of the planet’s overall temperature.
＊Greenhouse effect is an important and main cause of global warming.
＊The earth has some very important gases in the atmosphere that keeps us warm. When the sun heats the earth, these gases keep the heat on the earth's surface.
＊In a way, the earth is like a greenhouse.
But if the greenhouse effect becomes stronger, it could make the earth warmer than usual. Even a little extra warming of the earth may cause problems for humans, plants and animals.
What are the impacts of global warming
increase in extreme weather
more droughts and wildfires
rising sea level
less snow and ice
…
What can we do to deal with global warming
water conservation
LED bulb
renewable energy
carbon footprint
greenhouse effect
reusable water bottle
Share what you know about these expressions.
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
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
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
More about Climate Change
Pair-work
Work in pairs. Discuss what you can do to help deal with global warming, using the words and expressions you have learnt.
A: I will go to school by bike to reduce my carbon footprint.
B: I will bring a reusable bag when I go shopping.
...
We should turn off the lights when we leave the classroom so that we won’t have them burning all night. And remember to turn off our television, video player and computer when we are not using them.
It’s also a good behavior to turn off the taps when we find the water running. While brushing our teeth, shampooing the dog or washing the car, turn off the water until we actually need it for rinsing (冲洗).
More example about reducing Global Warming
Environmental problems to be solved
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.
Did you know
What do you know about smog
Listen to the lecture and choose the topics that are covered.
What the word “smog” means.
When the word “smog” appeared.
What caused smog in the past.
What causes smog now.
The effects of smog on the environment.
How governments try to reduce smog.
What will happen if we don’t reduce smog.
n. ( 尤指大学里的)讲座，讲课，演讲
Listen again and complete the slides.
Smog in the past
Term created in: _______
Big problem in London:
________________ in December 1952
Causes of the problem: burning too much
coal and ___________
1900s
The Great Smog
no wind
n. 幻灯片
Smog in the present
Causes of the problem:
___________________________
Measures: rules about using __________ in factories and ______________________ _________ in the city centre
chemicals coming from traffic
chemicals
requirements of paying to drive
Tapescript
Lecturer: Good evening, everyone, and thank you for coming to today's talk. I'm Dr Brown and I'm going to talk about air pollution in cities - what we all know as “smog”. Please feel free to stop me if you have any questions. So, first of all, a bit of history. The term “smog” was first used in the 1800s in cities that had problems with smoke and fog.
Student A: Sorry for interrupting, but I believe it was in the 1900s.
Lecturer: Sorry, I made a mistake. You are right. It was in the 1900s. Thank you. London was one of the cities where smog caused big problems. In December 1952, it suffered from “The Great Smog”. It was a very cold winter, so a lot of coal was burned at home and in the factories. The problem was that there was no wind, so thick smog covered the city. Nowadays….
Student B: Excuse me, but can I just ask - did the smog cause any death
Lecturer: I'm afraid so. According to research, about 4,000 people are known to have died as a result of the smog, but that number could much higher. It was terrible! Nowadays, smog till exists, but is produced by chemicals coming from traffic and factories. However, governments are taking measures to reduce smog as much as possible. Now, let's look at what smog does to our health...
Student A: If I could just stop you again... Can you give us examples of these measures
Lecturer: Well, for example, factories must follow rules about what chemicals they use. In some cities, when there's smog, people have to pay to drive in the centre. Now, let's move on to the impact of smog on our health….
Listen again if necessary.
Useful expressions:
1. Sorry for interrupting, but…
2. Excuse me, but can I just ask...
3. If I could…
4. Can you…
What do the students say to interrupt the lecturer politely
The classification of household waste aims to help people separate different types of waste. This is important because these different types of waste can be disposed of or recycled appropriately and effectively
Household waste can be roughly divided into:
* food waste
* non-recyclable waste
* recyclable waste, including paper, glass, plastic and use batteries
China plans to introduce household waste classification and sorting in the first batch of cities by 2020. Only Beijing, Shanghai, Tianjin and Chongqing are included in the first batch.
The target recycling rate in these cities has been set at 55% by 2020.
Student A
Work in pairs and talk about recycling.
Tell Student B about recycling using the information below. Be prepared to be corrected by Student B.
Student B
Used batteries are usually regarded as non-recyclable waste and should be disposed of separately.
The first batch of cities to introduce household waste classification and sorting includes Beijing, Shanghai, Tianjin, Chongqing and all capitals of provinces and autonomous regions.
The target recycling rate in these cities has been set at 35% by 2020.
Listen to Student A talking about recycling. Interrupt politely to correct him / her using the following information:
Think about another environmental problem and then make a similar conversation with your partner.
Homework
