论文标题
温室气体排放的安全操作空间
The safe operating space for greenhouse gas emissions
论文作者
论文摘要
气候变化的行星边界已经超过，因此人类必须决定回到行星边界以下的安全操作空间，以最大程度地降低大陆上有害甚至灾难性环境变化的风险。但是，该概念中使用的控制变量没有与生命周期评估中量化的当前指标联系起来。因此，必须将行星边界转化为生命周期评估指标的最大分数，以便评估生命周期的环境是否影响，例如产品和服务尊重行星边界。本文研究了将气候变化转化为行星边界的两种不同方法，以估计为二氧化碳等效的年度排放的温室气体的最大排放量，这是生命周期评估中常用的气候变化指标。这些估计可以作为在拟议的途径和路线图中生命周期环境影响的最终目标基准，用于再生回到行星边界，以实现气候变化。
The Planetary Boundary for Climate Change has been surpassed, and humanity must therefore decide on a pathway back to the safe operating space below the Planetary boundaries to minimise the risk of deleterious or even catastrophic environmental change at continental to global scales. However, the control variables used in the concept do not link to current indicators quantified in life-cycle assessments. Translating the Planetary Boundaries into maximum scores for life-cycle assessment indicators is therefore necessary to enable the assessment of whether life-cycle environmental impacts of e.g. products and services respect the Planetary Boundaries. This paper investigates two different approaches for translating the Planetary Boundary for Climate Change into estimations of maximum emission of greenhouse gasses expressed as annual emissions of CO2-equivalents, a commonly used Climate Change indicator in life-cycle assessments. The estimations may serve as an end goal benchmark for the life-cycle environmental impact of products and services in proposed pathways and roadmaps for the regeneration back to the Planetary Boundary for Climate Change.
