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We wouldnt be able to see the blue sky clearly, we'd get all sorts of respiratory diseases.

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The atmosphere will be unhealthy and cause diseases in the city . everyone in the world will one by one get sick . and the population  will reduce and get extinct . we should stop  pollution . some people are allergic to  dust this dust pollution causes harm to them . smoke is injurious to health it causes lung problems . hence we should reduce pollution and protect our nature . 
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answer please
here we r not allowed to chat
ok bye
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