大地之殇

＂毒土地＂如隐形＂杀手＂,难以察觉却可能直接危害人体健康,将处于食物链顶端的人类置于危险境地。此一悲剧性在于,人类是这一悲剧的总导演。天作孽犹可恕,自作孽不可活。自从有历史记录以来,人类从来就没有为脚下的土地担心过。这就如同人类从来没有担心过空气一样。历史上,人类也曾担心过水,担心没有水引起的干旱和因水过多而引起的洪灾,但从来没有担心过水会有毒。     

山水画廊新安秀

＂新安江的确是个好地方。这里山清水秀,鸟语花香,你可以在山间的溪水里尽情地嬉戏,摸鱼逮虾,喝上一口甘甜清冽的山水,任凭万千思绪在云里雾里飞扬。＂ ＂最爱的还是新安江的水,这里的水是透明的会说话的,柔软的沙子一层又一层,甘冽的清泉打开了儿时尘封的记忆，纯洁着心灵，淡看人生，一切会变得轻松而释然。亲们，来11巴，趁着炎炎夏日，去新安江消暑纳凉吧。＂     

到底谁是“伪专家”？

经济要发展,但环境也要保护,不能因为水电的过度开发而致长江珍稀、特有鱼类灭绝。在这一点上,水电专家有必要平心静气地多听听环保专家的意见,别动辄就称别人为＂伪专家＂。     

环境保护与人格教育

环境保护与人格教育上海市南洋模范中学张茂昌在临近世纪之门的时候，未来的脚步声已隐约可辨。面对２１世纪现代基础教育的挑战，南洋模范中学鲜明地树起了＂人格教育＂的旗帜。南洋模范中学近百年的办学历史告诉我们：成才必先育人，只有当知识与品格、意志、价值观倾向...     

引领中国水泥生态发展 勇当“美丽中国”建设先锋——北京市琉璃河水泥有限公司践行生态文明纪实

北京市琉璃河水泥有限公司（简称琉水）始建于1939年。自1982年被北京市建筑材料工业局授予为＂粉尘治理、环境保护先进单位＂以来,琉水先后荣获＂北京市首批十家循环经济试点单位＂、十一五期间＂靠新出强优秀企业＂、十一五＂全国节能先进集体＂、＂首都绿化美化花园式单位＂、＂北京市节能减排教育基地＂。如今,要圆美丽中国梦、美丽首都梦、百年琉水梦,要给子孙后代,留下天蓝、地绿、水净的美好家园,琉水已经做了充足准备。     

自然毒引起的食物中毒

对于象河鲀、毒蘑菇这些早巳为人们所知的有毒性动植物,因误吃或烹饪方法不当引起的中毒,也就是由食物或其类似物的固有成分引起的食物中毒称为自然毒。严格地讲,某些     

攻破家中“毒”堡垒

人们对生活环境越来越重视,为了防止健康"杀手"随时出现,为了守住最后的堡垒——家,人们对买回来的菜使劲地泡,外面穿的衣服回家后立刻换掉,家里的地板、家具一律要绿色环保产品……可是,在你严格地筑起防御"堡垒"的时候,也有意无意地把"毒"带回了家,至使家家户户都藏有不少的"毒"。     

可怕的“毒物”

谈到“毒”的东西，人们往往一般认为是鹤顶红，毒蛇、毒蝎等等。其实在大千世界里，还有比它们更加“毒”的。     

在和谐校园里孕育绿色希望——广东省东莞市石碣袁崇焕中学环境教育纪实

广东省东莞市石碣袁崇焕中学,创办于2000年秋,地处东莞市北部、东江河畔,校园芳草如茵,绿树掩映,环境清幽,景色宜人,为师生提供了优美的学习和生活环境。近年来,学校卓有成效地开展了创建＂全国环境教育示范学校＂工作,推动了学校环境教育事业的较快发展,学校先后获得＂广东省绿色学校＂,＂东莞市科普特色学校＂、＂东莞市园林式单位＂等荣誉。     

超级儿童的儿童节

＂六一＂儿童节将至,而现如今儿童节不再是孩子的专属节日,越来越多的＂70＂、＂80＂后作为超级儿童加入其中自得其乐。对于这些超级儿童来说,＂六一＂不仅是一个节日,更是一个符号。在当前怀旧风行的年代，     

中国土地利用和土地覆被变化研究进展

受国际社会影响，中国加强了土地利用／覆盖变化研究的进程，在众多领域取得了瞩目的成就，主要包括动态监测、遥感分类和制图、LUCC驱动力和区域LUCC模型、环境效应等方面，但中国LUCC研究也存在很多突出的问题，包括跨学科、时空尺度、理论体系完善、研究方法、与全球和区域环境变化及可持续发展之间的关系等。为促进中国土地利用／覆盖变化研究的持续、健康发展，提出对中国LUCC研究的建议和展望包括建立LUCC理论体系，深入掌握LUCC动态研究的手段和方法，形成与中国国情密切结合的土地利用和覆被变化综合模型，转变研究重点，更加清晰地认识和把握LUCC有关的可持续发展问题，加强土地利用变化与生态安全机制的研究等。     

土地级别的不确定性

根据Rough集理论，提出了土地级别不确定性模型和精度测度模型，用精度测度表示确定性分类精度和不确定性分类精度，以及分析了土地定级中级别划分的不确定性和不同级别分类质量的变化规律。     

Land Use Change and Land Degradation in Southeastern Mediterranean Spain

The magnitude of the environmental and social consequences of soil erosion and land degradation in semiarid areas of the Mediterranean region has long been recognized and studied. This paper investigates the interrelationship between land use/cover (LULC) changes and land degradation using remotely sensed and ancillary data for southeastern Spain. The area of study, the Xaló River catchment situated in the north of the Alicante Province, has been subjected to a number of LULC changes during the second half of the 20th century such as agricultural abandonment, forest fires, and tourist development. Aerial photographs dating back to 1956 were used for the delineation of historic LULC types; Landsat ETM+ data were used for the analysis and mapping of current conditions. Two important indicators of land degradation, namely, susceptibility to surface runoff and soil erosion, were estimated for the two dates using easily parametrizable models. The comparison of 1956 to 2000 conditions shows an overall “recuperating” trend over the catchment and increased susceptibility to soil erosion only in 3% of the catchment area. The results also identify potential degradation hot-spots where mitigation measures should be taken to prevent further degradation. The readily implemented methodology, based on modest data requirements demonstrated by this study, is a useful tool for catchment to regional scale land use change and land degradation studies and strategic planning for environmental management.     

我国土地年租制的发展趋势--年租制与增量土地供应

随着我国产业结构的急剧变化，城市建设用地需求量激增，与农业争地现象严重，征地、供地环节的问题日益突出。在这种环境下，实施土地年租制的重要性逐渐凸显。在肯定年租制盘活城市存量土地的有效作用的基础上，着重分析了在增量土地供应环节引入年租制，对进一步完善土地有偿使用制度，从而遏制圈地运动，协助解决征地补偿问题，以及为国家创造更多的土地收益等方面的积极作用，为我国年租制的发展方向提供理论参考和实践依据。     

The Impact of Land Use/Land Cover Changes on Land Degradation Dynamics: A Mediterranean Case Study

In the last decades, due to climate changes, soil deterioration, and Land Use/Land Cover Changes (LULCCs), land degradation risk has become one of the most important ecological issues at the global level. Land degradation involves two interlocking systems: the natural ecosystem and the socio-economic system. The complexity of land degradation processes should be addressed using a multidisciplinary approach. Therefore, the aim of this work is to assess diachronically land degradation dynamics under changing land covers. This paper analyzes LULCCs and the parallel increase in the level of land sensitivity to degradation along the coastal belt of Sardinia (Italy), a typical Mediterranean region where human pressure affects the landscape characteristics through fires, intensive agricultural practices, land abandonment, urban sprawl, and tourism concentration. Results reveal that two factors mainly affect the level of land sensitivity to degradation in the study area: (i) land abandonment and (ii) unsustainable use of rural and peri-urban areas. Taken together, these factors represent the primary cause of the LULCCs observed in coastal Sardinia. By linking the structural features of the Mediterranean landscape with its functional land degradation dynamics over time, these results contribute to orienting policies for sustainable land management in Mediterranean coastal areas.     

土地开发整理项目中的权属调整研究

土地开发整理是在我国现阶段土地资源日益稀缺的严峻情况下,国家为了缓和经济与土地之间的矛盾提出的,目的是实现土地的可持续利用.在此背景下,土地开发整理类型越来越多样化和复杂化,随之带来的土地权属问题日益突出.在对土地开发整理权属问题的本质认识基础上,阐述了权属争议问题的类型,提出了土地开发整理中权属调整的工作措施和技术方案,以及规范化、科学化土地开发整理权属调整的建议.     

土地使用权出让与土地利用总体规划

本文在论述土地使用权出让和土地利用总体规划内涵的基础上,研究了两者作用和反作用的关系,提出了两者最终目标一致性的观点,并探讨了实践上相关的问题。     

Exploring Land Developer Perspectives on Conservation Subdivision Design and Environmentally Sustainable Land Development

Insight into land developers’ perspectives on alternative residential developments and the barriers they experience in trying to develop them can be crucial in efforts to change environmentally damaging low-density, large-lot, and automobile-dependent residential patterns. Using a semi-structured interview instrument followed by short surveys, I examined the views of 16 developers in Waukesha County, WI, USA, a county that has experienced significant development pressures and widespread implementation of conservation subdivision design. The land developer investigation focused on conservation subdivision design familiarity and implementation, and identified a number of barriers that developers experienced in implementing the design. While the majority of the developers appeared familiar with the design and had experience developing conservation subdivisions, their motivations for developing them varied, as did their on-site conservation practices. The barriers included the lack of land use regulations supporting the design, economic factors, community opposition, and a lack of knowledge about sustainable residential development practices. Strategies to promote more environmentally sustainable residential land development patterns include providing a more supportive institutional environment, enacting different regulations and guidelines for natural resources protection, and offering education on ecologically sound development and planning practices.     

农地开发整理新增耕地价格评估

有序的农地流转市场需要有价格体系支持.以国家投资的一个重点农地整理项目为例,探讨了农地整理新增耕地价格的内涵、特点、价格评估的必要性、原则和估价方法的选择,并运用成本法评估了新增耕地的价格,旨在为目前我国全面开展的农地开发整理新增耕地入市价格评估提供实践依据.     

Land Management Versus Natural Factors in Land Instability: Some Examples in Northern Spain

The objective of this work is to test a hypothesis formulated on the basis of former results which considers that there might be a “global geomorphic change,” due to activities related to land management and not determined by climate change, which could be causing an acceleration of geomorphic processes. Possible relationships between some geomorphic processes related to land instability (landslides or sediment generation) and potential triggering factors are analyzed in study areas in northern Spain. The analysis is based on landslide inventories covering different periods, as well as the determination of sedimentation rates. Temporal landslide and sedimentation rate trends are compared with different indicators of human activities (land-use change, logging, forest fires) and with potential natural triggers (rainfall, seismicity). The possible influence of the road network in the distribution of landslides is also analyzed. Results obtained show that there is a general increase of both landslide and sedimentation rates with time that cannot be explained satisfactorily by observed rainfall trends and even less by seismicity. Land-use change appears to be by far the main factor leading to land instability, with some changes producing up to a 12-fold increase of landslide rate. A relationship between road network and the spatial distribution of landslides has also been observed. These results do confirm the existence of an acceleration of geomorphic processes in the region, and also suggest that climate-related factors play a limited role in the changes observed.