噪声、空气不洁和化学物污染已成为当今威胁人类健康的“三大公害”。

The noise, unclean air and chemical pollution have become the three disasters threatening human health.

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教育改善之后，人们将能够建设与大自然和谐相处的美好社会，也许还能消灭由三大公害带来的死亡和痛苦。

With better education, people will be able to build a better society in harmony with nature and perhaps put an end to the death and suffering caused by the big three.

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但急剧上升的未成年人犯罪已经同环境污染、吸毒贩毒并称为当今世界的“三大公害”，这不得不引起社会各界的高度重视。

But the juvenile delinquency is already the world's "three major public hazards" together with environment pollution and drug taking and drugtrafficking. The question must arouse special attention.

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