资源简介

(共22张PPT)
Unit 3 The environment
Listening
The world's top ten environmental problems
◆ 1. Global warming —— 全球变暖
◆ 2. Ozone layer depletion —— 臭氧层破坏
◆ 3. Loss of biodiversity —— 生物多样性减少
◆ 4. The spread of acid rain —— 酸雨蔓延
◆ 5. Forest dropped —— 森林锐减
Part I Lead-in
The world's top ten environmental problems
◆ 6. Desertification —— 土地荒漠化
◆ 7. Air pollution —— 大气污染
◆ 8. Water pollution —— 水体污染
◆ 9. Marine pollution —— 海洋污染
◆ 10. Cross-boundary movements of poisonous
wastes —— 毒性废弃物越境转移
NO.1 Global warming
◆ Gradually increasing the greenhouse
effect leads to Earth's temperature rising.
◆ abnormal weather (异常天气),
species extinction (物种灭绝),
the sea level rising.
Help!
NO.2 Ozone layer depletion
◆ Ozone (O3) layer: the Earth's protective layer
◆ Main hazards:
strong UV (ultra-violet ray 紫外线) radiation
can damage immune system (免疫系统) of
human natures and animals , cause skin cancer
and cataracts (白内障), damage to the Earth’s
ecosystems (全球生态系统).
NO.3 Loss of biodiversity
◆ Global extinction of 50,000 species / year,
140 / day on average.
NO.4 The spread of acid rain
◆ pH <5.6 referred as acid rain (酸雨).
◆ Main hazards:
Water and soil acidification (酸化), plant and animal death, corrosion (腐蚀) buildings, railways and bridges and other facilities.
NO.5 Forest dropped
◆ Huge numbers of global deforestation.
NO.6 Desertification
◆ 600 million square kilometres of land into desert
each year.
NO.7 Air pollution
◆ Sulfide and nitrogen oxides (硫化物和氮氧化合物) into the atmosphere worldwide up to 30 million tons each year.
NO.8 Water pollution
◆ About 40% of the world’s rivers are seriously polluted.
◆ Freshwater (淡水) resources are becoming exhausted.
NO.9 Marine pollution
◆ Hundreds of tons of silt and waste (淤泥和废弃物)
into the coastal waters annually.
NO.10 Cross-boundary movements of
poisonous wastes
◆ Toxic (有毒的) waste induced cancers.
Caring for the environment
What are the environmental problems according to the pictures
Part II Pre-Listening
solution n. 解决办法；处理手段
government n. 政府
New words and expressions
Listening
A Listen to two women calling into a radio programme to talk about environmental problems. Arrange the pictures below in the correct order by writing the numbers 1-3 in the boxes.
2
2
3
1
3
1
Part III While-Listening
B Listen to the recording again and fill in the table below. Write one word in each blank.
underground station
pick up
put up
Do not litter
noise
building manager
Contact
Tapescripts
Radio host: Our next caller is Tammy. Tammy,
you’re on the air.
Tammy: I live near an underground station. This morning, the ground outside the station was clean. But in the afternoon, some people started giving out advertisements outside the station. Many people threw these advertisements on the ground. Now the road is full of litter. What can we do
Part IV Post-Listening
Radio host: Well, you can go out with your friends and help pick up the litter. You can also
ask the workers at the underground station to put up a sign saying, “Do not litter.”
Tammy: Thanks. That sounds great.
Radio host: I’m glad to help. Now we have Louise. How can we help you, Louise
Louise: My family has a lot of problems with noise
pollution. First, our neighbour plays the drums and we cannot sleep at night! Next is the awful noise from cars. That goes on all day. Finally, next year, there’ll be a building site nearby. It’ll be noisy. What can we do
Radio host: Well, when you have a noisy neighbour, you need to talk to the building
manager. As for the cars and building site, you can contact the city
government and see if that helps.
Dictation
解决办法；处理手段
政府
solution
government
Part V Review
Thank you!

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