Abstract Aware of the strong population growth expected in the coming years in cities, it is imperative to evaluate the impact of this new concentration on the environment, health and power consumption. Life Cycle Assessment (LCA) is the most appropriate method to quantify these different impacts. The aim of this study is to carry out the Life Cycle Analysis (LCA) in two sustainable and old neighbourhoods located in Belgium, while comparing different environmental impacts; but also, to determine the most important source of environmental change at the neighbourhood scale. This study begins with a strong review on LCA in residence buildings and neighbourhoods since 1996 up to 2018.Then followed by the assessment and comparison of the climate variation in six different periods (past, current, 2020,2050,2080 and 2100).In the same line, three scenarios (A2, B1 and A1B)were associated to several models of the Intergovernmental Panel on Climate Change (IPCC). We have combined three simulation tools, such as ALCYONE, COMFIE-PLEIADES and nova-EQUER. The main results showed the twelve environmental impacts studied in this research that does not always evolve in the same way. Indeed, it was noticed that the CO2 emissions were up to 36.6% higher in an old neighbourhood than in a sustainable one; while the energy demand was estimated at 62.6% and 37.4% in an old and a sustainable one, respectively. Good planning of the public space will play an important role to reduce in average up to 15% the eutrophication in both neighbourhoods. Globally, the renovation of residential buildings is very important, indeed, it allows mitigate in average up to 30% of environment impacts in both neighbourhoods.

中文翻译：

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比利时一个城市受气候变化影响的两个可持续老街区的生命周期评估：综述

摘要 意识到未来几年城市人口的强劲增长，必须评估这种新的集中对环境、健康和电力消耗的影响。生命周期评估 (LCA) 是量化这些不同影响的最合适方法。本研究的目的是在比利时的两个可持续发展老街区进行生命周期分析 (LCA)，同时比较不同的环境影响；而且，要确定邻里范围内环境变化的最重要来源。本研究首先对 1996 年至 2018 年住宅建筑和社区的 LCA 进行了强有力的回顾，然后对六个不同时期（过去、现在、2020、2050、2080 和 2100 年）的气候变化进行了评估和比较。同一条线，三种情景（A2、B1 和 A1B）与政府间气候变化专门委员会 (IPCC) 的几个模型相关。我们结合了三种仿真工具，例如ALCYONE、COMFIE-PLEIADES 和nova-EQUER。主要结果表明，本研究中研究的十二种环境影响并不总是以相同的方式演变。事实上，人们注意到老街区的二氧化碳排放量比可持续街区高出 36.6%；而旧的和可持续的能源需求估计分别为 62.6% 和 37.4%。良好的公共空间规划将发挥重要作用，将两个社区的富营养化平均减少 15%。在全球范围内，住宅建筑的翻新非常重要，确实，