Sandstorm is a meteorological disaster, but also a serious ecological environment problem.

沙尘暴是一种气象灾害，也是严重的生态环境问题。

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The protection and recovery of ecological environment after exploited thecoal mine is an important problem.

矿区开发后生态环境的保护和恢复是一个重要问题。

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The protection and recovery of ecological environment after exploited thecoal mine is an important problem.

矿区开发后生态环境的保护和恢复是一个重要问题。

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