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第84页

信息发布者：

makes

dirty

rubbish

bin

keep

clean

trees

throw

fall

sweep

clean

walk

 comes from factories

 makes the river dirty

 too many trees

 litter everywhere

 plant more trees

 stop throwing rubbish into rivers

 use cars less

The Earth is our mother. She is ill. Why?
Black smoke comes from factories.
Dirty water makes the river dirty.
People cut down too many trees.
People also litter everywhere.
To help the Earth, what can we do?
We can plant more trees.
We can stop throwing rubbish into rivers.
We can use cars less.