市政园林绿化的建设过程、功能要求和经营目的，与林业有所不同，但都是生产建设的组成部分，一个是以取材为主，一个是以环境保护为主。城市绿化是对社会环境资本的投入，其经济回报是多方面的，而且是十分丰厚的。城市对园林的需求分为两个方面：一是作为基础设施；二是作为休闲设施。前者应当由市政当局作为公共产品共给全体市民，后者则可以由法人实体作为法人产品提供给部分市民。

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