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选修8《Warm-up》PPT课件优质课下载
Discussion：
air pollution
water pollution
noise pollution
deforestation(采伐森林)
White pollution
deforestation(采伐森林)
white pollution
problems
water
pollution
noise pollution
air
pollution
How much do you know about environmental problems? Use the Key Words to complete the sentences.
global warming, the greenhouse effect, endangered animals, natural disasters, flooding, poverty, over-fishing
Key Words
Part I
Warm-up
1) Earthquakes and volcanic eruptions are examples of _______________.
natural disasters
2) Pandas and tigers are ___________________.
endangered animals
3) Because of ____________________, the Earth is warmed by gases trapped in the atmosphere.
Earth