Heavy Metals in Epiphytic Mosses: An Experience in Florence

The epiphytic moss Hypnum cupressiforme has been used for passive monitoring of airborne heavy metals pollution by vehicular traffic in the urban area of Florence. Lead, cadmium, zinc and copper were determined by differential pulse anodic stripping voltammetry (DPASV). in the summer of 1993 about 30 samples were collected from the trunks of holm oak at the same height (1 metre) from the soil. Lead contents fall within the range of 0.02-1.08 μ moles g^-1 (dry weight) and for this metal, the emission source may be attributed mainly to vehicular traffic in poorly industrialized urban areas. Some evaluations have been carried out about the employment of Zn/Pb molar ratio for characterizing airborne pollution in urban areas.     

长江沿江地区跨世纪农业持续发展战略

分析了长江沿江地区农业自然资源优势，农业在全国的战略地位，指出农业持续发展面临的挑战，并结合区域农业持续发展的前景，提出了农业持续发展的宏观战略。     

An interactive simulation model of urban ecosystem and its implementation

An interactive simulation model is established based on the methodology of "sensitivity model" (SM) during the cooperative research process between the founders of SM and the authors. And the conceptual framework of SM is developed into the interactively qualitative and quantitative simulation model presented in this paper, which makes it possible to break down a complex urban ecosystem into simple and visual quantitative or qualitative relationships between the factors. By studying the dynamic responses of the system to the changes of the inputs and parameters of the model, future trends in urban development can be predicted and strategies formulated. The whole process is realized on micro-computer in the course of man-computer interaction. Its potential use is shown in a case of Tianjin City.     

成都市汽车排放物污染及其治理措施

本文从成都市的地形、气候、道路和车辆状况出发,论述了汽车排放物污染及其对人体健康和大气环境的影响。针对汽车排放物污染的治理,文章提出必须及早制定出适合本市具体情况的治理方案,加强对在用车的技术改造。文章还就城市道路建设及交通管理提出了一些建设性意见。     

重庆高新区可持续发展水平评价与对策研究

提出了建立重庆高新区可持续发展评价指标体系的6项基本原则，从经济高效、社会文明、环境舒适（ESE）3方面设计了包括3个高层指标、8个中层指标、45个单项指标的指标体系。采用特尔斐法、层次分析法和线性加权法，对评价指数进行了量化计算和整合，据此评价重庆高新区的可持续发展水平，并对照发展性质相似的苏州高新区、深圳高新区，指出重庆高新区在发展中存在的问题，并提出可持续发展的若干对策。     

城市内河环境综合整治工程环境影响评价探讨

以南宁市竹排冲环境综合整治工程为例,探讨此类建设项目中施工扬尘、噪声、固废物处置及水土流失、底泥疏浚与处置的环境影响评价要点;针对项目施工期的环境影响和营运期对河流生态系统的影响,提出切实可行的环保措施和建议。     

应用BP神经网络预测城市需水量的探析

在对辽宁省营口市城市需水量预测中，采用BP人工神经网络方法对该市人均综合用水量进行预测。进而预测出城市需水量，取得了满意效果。从精度检验、数据类比和趋势分析等角度，论证了此种预测方法的可行性和有效性。     

现行城市机动车排放控制法律调整存在的不足与对策

针对目前中国城市机动车高速发展而带来了城市大气环境污染负面问题，分析了现阶段对城市机动车排放控制存在的法律责任界定不清、执法部门权责不明、市场机制运作不完善等缺陷，提出从法律视野进行调整，充分发挥法律的规制功能和权威力量，明确行政主管部门权责，健全机动车从生产-销售-回收以及与石油等部门的市场调节机制，最终促进城市机动车尾气排放得到有效的控制，营造良好的城市环境。     

城市生态学评价——方法和实例研究

通过对城市生态系统的分析,提出了城市生态学评价的内容、目标和程序。以新建城市博达为例,具体说明了该评价程序的使用方法。     

珠海生态示范区可持续发展分析

围绕《珠海生态示范区建设规划》概述生态示范区建设的指导思想，目的原则与目标，并从生态资源，经济发展两方面分析生态示范区建设是实现可持续发展的重要途径。