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Many animals lost their home.
We must protect the Earth.
We must save our home.
This is the water pollution.
People cut down too many trees.
This is the air pollution.
This is the land pollution.
Many years ago, the Earth
was very clean.
But now there is much pollution.
There are lots of forests.
There are many countries and cities.
And there are many people.
This is the?Earth.
The green part is land.
The blue part is sea.
The white part is cloud.
There are rivers, seas and lakes.
There are hills and mountains.
Our Earth, our home.
Let’s know the Earth.
4
2
3
1
Read and find out the four titles(标题).
Watch and say
Save water
Save energy
Save trees