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Air is important .It keeps people ,animals and plants alive.
The ail in our city was clean ,but now it is dirty.Smoke from cars ,buses and factories make it dirty.
We should plant more trees.
We should ride a bike more often.
Let's keep the air clean!
The ail in our city was clean ,but now it is dirty.Smoke from cars ,buses and factories make it dirty.
We should plant more trees.
We should ride a bike more often.
Let's keep the air clean!
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