最近我们举行了一个类会议来讨论这个问题的“爱护环境，保护地球”我们可以看到，气候异常的空气、水、土壤和其他严重污染。
Recently we held a class meeting to discuss the problem of "Good care environment, protect the earth". As we can see, the climate anomalies in the air, water, soil and other serious pollution.
其中最严重的问题是严重污染的空气，水和土壤。
One of the most serious problems is the serious pollution of air, water and soil.
最严重的问题是严重污染了的空气、水和土壤。污染的空气对人体健康危害很大。
One of the most serious problems is the serious pollution of air, water and soil. the polluted air does great harm to people's health.
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