Challenges and missing links to assess absolute environmental sustainability

The results of the most prevalent environmental lifecycle assessments represent the relative impact on the environment caused by the object being assessed. Hereby, the object is compared to its alternatives (to derive: Which is the better solution?) rather than to the carrying capacities of nature (to determine: Is it ultimately sustainable or not?). This poses a problem for implementing and assessing the progress towards sustainable development. In connection to this, prior research has started categorizing the constitutive research on lifecycle-based absolute environmental sustainability assessments.This paper adds to these efforts and provides a new point of view by categorizing the absolute environmental sustainability assessment approaches within the driver-pressure-state-impact-response framework. Hereby, we focus on the absolute environmental sustainability assessment approaches of (1.) the precedent methods of absolute pressures, and (2.) the state-of-the-art approaches of the impacts on nature. Their common challenges and limitations are discussed, along with a theoretical example. From there, we conclude the proposal of incorporating the absolute environmental sustainability pressure methods into the current discussion on lifecycle-based absolute environmental sustainability assessment approaches. Ultimately, we conclude that further research is required to connect the approaches to the level of application.