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《Lesson 1 Global Warming》PPT课件优质课下载
Melting ice
poverty
overfishing
natural
disasters
pollution
Environmental
problems
global
warming
poverty
forest
destruction
endangered
animals
greenhouse
effect
Brainstorm
One of the biggest problems of 21st century
What’s wrong?
The earth is sweating !!!
----Global warming
A. Acid rain
B. Greenhouse effect
Lead-in