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ocean
The blue parts are...
The green parts ...
The ...
What are the blue/green/brown parts?
In the past,the Earth was very clean and beautiful.
Why does the Earth become dirty now?
Because ...
throw rubbish into rivers
cut down so many trees
use plastic bags
We should stop
We should
We should stop
We should
throwing rubbish into
rivers.
throw rubbish into bins.
We should
using plastic bags.
We should stop
use shopping bags.
We should
cutting down so many trees.
We should stop
plant more trees.
We should stop throwing rubbish into rivers.
We should stop cutting down so many trees.
We should stop using plastic bags.
Let’s read！