chapter 2 lesson 2 macca's version
Post on 12-Jul-2015
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The environment is changing for the (better/worse) because__________.
Lesson 2 The Environment
Word bankglobal warming 全球变暖
pollution 污染
irrigate 灌溉
developed country 发达国家
developing country 发展中国家
natural resource 自然资源
topsoil 表土层
daylight saving time 夏令时
Extension wordsozone layer 臭氧层
refrigeration system 冷却系统
What Is Global Warming?
What Is Global Warming?
What About Air Pollution?
Where does most air pollution come from?
What is pollution?
ozone layer （臭氧层）
Why is the ozone layer important?
Ozone Hole Peaks Over Antarctica
What About Water Pollution and Erosion? The oceans
Water Pollution
soil erosion （土壤侵蚀）
What causes soil erosion?
♣ overgrazing （过度放牧）
♣ deforestation （森林砍伐）
♣ bad farming methods
Soil erosion ( 土壤侵蚀 )
How Do People and Environment Interact?♣ dams （水坝）
♣ irrigation （灌溉）
What are some ways people have adapted to the environment?
daylight saving time（夏令时）
What Will Improve the Environment?
What Are Developing Countries Doing?
What’s the difference between developing country and developed country?
Why do people in poor countries cut down their forests?
What are some ways rich countries affect （影响） poorer ones?
How Can People Protect the Environment?
reducing （减少）
reusing （再使用）
recycling （回收利用）
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