PDF(Pubmed)
Abstract：
The important contributions of urban trees and green spaces to for example, climate moderation and public health have been recognized. This paper discusses guidelines and norms that promote the benefits of viewing green, living amongst green, and having easy access to green spaces for recreational use. Having trees and other vegetation in sight from one\'s home, place of work, or school has important mental health and performance benefits. Local tree canopy cover is positively associated with cooling and other aspects of climate moderation. With public green spaces in proximity to one\'s home stimulates regular use of these areas and results in positive impacts on mental, physical, and social health. After analyzing existing guidelines and rules for urban green space planning and provision, a new, comprehensive guideline is presented, known as the \'3-30-300 rule\' for urban forestry. This guideline aims to provide equitable access to trees and green spaces and their benefits by setting the thresholds of having at least 3 well-established trees in view from every home, school, and place of work, no less than a 30% tree canopy in every neighbourhood; and no more than 300 m to the nearest public green space from every residence. Current implementation of this new guideline is discussed, as well as the advantages and disadvantages of using this evidence-based but also clear and simple rules.
摘要：
例如，城市树木和绿地对城市的重要贡献，气候适度和公共卫生已经得到认可。本文讨论了促进观看绿色的好处的指南和规范，生活在绿色之中，并方便进入绿色空间供娱乐使用。从家里看到树木和其他植被，工作地点,或学校有重要的心理健康和表现的好处。当地的树冠覆盖与降温和气候适度的其他方面呈正相关。随着公共绿地靠近一个人的家，刺激了这些区域的定期使用，并对精神产生积极影响，物理，和社会健康。在分析了现有的城市绿地规划和提供的指导方针和规则后，一个新的,提出了全面的指导方针，被称为城市林业的“3-30-300规则”。本指南旨在通过设定从每个家庭观看至少3棵完善的树木的门槛，提供对树木和绿地的公平访问及其好处，学校,和工作地点，每个社区不少于30%的树冠；距离每个住宅最近的公共绿地不超过300米。讨论了这一新指南的当前实施情况，以及使用这种循证规则的优点和缺点，但也明确和简单。
