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1·A report by the UN Environment Programme said oil spills had contaminated land, sea and air to such an extent that it seriously threatened public health in some areas.

一份联合国环境规划署的报告称，石油泄漏严重污染了土地，海洋和空气，在某些地区甚至威胁到公众健康。

2·With the practice and development of contaminated land replacement for 20 years, many countries have formed a complete system on the identification, assessment, and management of contaminated land.

国际上污染土地置换开发的环境管理已有20多年的实践，在污染土地的识别、评价及其处理与管理、法规建设等方面上形成一整套体系。