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选修8《Lesson 1 Global Warming》精品PPT课件优质课下载
Part1 Warming up
1. What is global warming?
2.What caused global warming?
Global warming refers to the fact that the earth’s ______________ is _______________ near its surface.
It is _____________________ that has caused global warming.
atmosphere
warming
human activity
human activity
temperature
carbon dioxide, methane and water vapour
produce
rise
Part 2 Discussion
Let’s take a look at our school campus. Would you please talk about students’ activities/ behaviour contributing to global warming?
↓
↓
Problem 1
Solution
Why?
How?
A waste of water and electricity
1. _______ water ,the world would be ________.
2. Water is a _________ resource.
1. Form the habit of ___________ the water tap /electrical appliance ______________________