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The world population will continue to i___________ in the next few years.
The?f__________?took away thousands of lives.
Cutting down trees d________ the surface of the soil.
We can r_______ as many things as we can to protect the Earth.
5. We still can't find out a s______ to the problem. SHAPE \* MERGEFORMAT
（二）课前预习
背景资料补充
The greenhouse effect (温室效应)is the process of the gradual rise in temperature of the Earth ’s atmosphere. The Earth is getting warmer as an increase of gases such as carbon dioxide in the atmosphere traps the heat of the Sun.
The greenhouse effect results in polar ice melting and the rise of sea levels. Hurricanes（飓风） and other storms are other storms are likely to happen more frequently as well as floods and droughts(旱灾) . in addition , fresh water will be less available and some diseases spread faster.
（三）阅读任务：
Step1 warming-up
学生看图简单介绍地球目前面临的问题
Step2 predicting 可能引起的后果。
Step3 While-reading
Task 1 Fast reading
Read the text and finish the chart. （快速阅读课文）
The world is ____________________
Main problem1:________________________________
Main problem 2:_______________________________
Main problem 3:_______________________________
Solution: We need to___________________________
Task 2 Detail-reading （细读）
1) Read the first part of the text and put the sentences below in the right order.
( )Too much CO2 pollutes the atmosphere.
( )The atmosphere keeps in too much heat.
( )The greenhouse effect takes place — the Earth’s temperature increases.
( )People burn fuels such as petrol and coal and produce a lot of CO2.
Read the second part of the text and complete the diagram.
Cause原因
We destroy nature by ________________