Limited information on contaminated sites has been provided by countries in response to the request contained in the letter of 24 April 2007 from the Director of the UNEP Division of Technology, Industry and Economics.
4．　针对环境署技术、工业和经济司司长2007年4月24日的信件内的要求，一些国家提供了有限的关于场址污染的资料。