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英文文献：Evaluating the Impact of Government Land Use Policies on Tree Canopy Coverage-评估政府土地使用政策对树冠覆盖的影响
英文文献作者：Dorfman, Jeffrey H.,Hill, Elizabeth,Kramer, Elizabeth
英文文献摘要：
Many communities are experiencing the negative effects associated with not sustaining a sufficient level of tree canopy coverage. Tree canopy plays a crucial role in the environment, providing benefits such as clean water and air, erosion prevention, climate control, and sustained ecological resources and native species habitat. Additionally, tree canopy plays an economic role by increasing housing values, alleviating expenditures related to erosion destruction, decreasing spending on sewer standards, increasing energy efficiency, and reducing medical costs related to health issues, such as asthma, that are associated with environmental degradation. To study how local government policies may be related to changes in tree canopy, an empirical study was performed using Greater Metropolitan Atlanta as the study area. The statistical analysis identifies local government policies that are effective, such as specific tree ordinance clauses and zoning regulations. Policies that are ineffective (e.g., a tree board) are also identified.
许多社区正在经历与不能维持足够水平的树冠覆盖有关的负面影响。树冠在环境中起着至关重要的作用，提供诸如清洁的水和空气、防止侵蚀、控制气候、可持续的生态资源和本地物种栖息地等好处。此外，树冠还发挥经济作用，增加住房价值，减轻与侵蚀破坏有关的支出，减少下水道标准方面的支出，提高能源效率，以及减少与健康问题有关的医疗费用，如与环境退化有关的哮喘。为了研究地方政府政策与树冠变化之间的关系，本研究以亚特兰大市区为研究区域进行了一项实证研究。统计分析确定当地政府的政策是有效的，如具体的树木条例条款和分区规定。无效的政策(例如，树木委员会)也被确定。
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