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选修8《Lesson 1 Global Warming》PPT课件优质课下载
overfishing
natural
disaster
pollution
Environmental
problems
Do a Brain storm
global
warming
poverty
forest
destruction
endangered
animals
wars
The biggest problem of 21st century
Global warming
What is global warming and
the greenhouse effect?
What is global warming?
Global warming means
an average increase in the Earth’s temperature which leads to climate change.
The greenhouse effect
Causes of global warming
vehicles