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一、根据句子意思和给出的图片，写出正确的单词。
1.The world population will continue to i___________ in the next few years.
2.The?f__________?took away thousands of lives.
3.Cutting down trees d________ the surface of the soil.
4.We can r_______ as many things as we can to protect the Earth.
5. We still can't find out a s______ to the problem.
ncrease
lood
estroys
ecycle
olution
What do the pictures tell us?
Warming-up
Heavy smoke polluted our air.
Cut down trees and destroyed their homes
mountains of rubbish
Polluted the river
大量的
Result in floods and droughts 旱灾
What problems will the Earth face?
While-reading
Cutting down forests
The greenhouse effect
take
proper action
Bad habits
in danger
in danger
在危险中
Read the text and finish the chart.