I think the biggest environment problem in my country is air pollution .
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user
Yes , I agree . The air here is much more polluted than in my country . Of course , my country is more agricultural and has much less industry .
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assistant
We have reduced emission of air pollutants in recent years , but cars are still a major source of them . Factories have become cleaner as stricter environment pollution law have been introduced .
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user
The problem is now on a truly global scale . I don't believe that any single country can do anything about it .
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assistant