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北师大2003课标版《Lesson 1 Global Warming》集体备课PPT课件优质课下载
1.What are the causes of global warming?
2. What are the effects of global warming?
Questions
Review
Review
pollution from burning fossil fuels
The causes of global warming:
over population
The causes of global warming:
Review
deforestation（砍伐森林）
The causes of global warming:
Review
2. What are the effects of global warming?
Review
Review
Melting glaciers
flood
Review
Famines（饥荒）
diseases
The earth is in danger.
What can we do about global warming?
Read the passage, and answer the questions below:
1.How many letters are there in this passage? What are they about?