Spatially-explicit absolute life cycle assessment by multi-regional hybrid modeling: Computational framework

Human activities, environmental impacts, and the provision of ecosystem services vary by region. The existing regional environmental sustainability assessment approaches addressed such regional heterogeneity of inventory data at a single scale (i.e., either process or economy scale). However, depending on regional data availability and the assessment scope, a multiscale modeling approach that integrates existing data and models at various scales needs to be employed. This work introduces a general computational framework for spatially-explicit environmental sustainability assessment based on a multi-regional hybrid modeling approach. The developed framework accounts for regional activities at multiple scales by integrating the existing regional approaches at each scale. Also, the framework integrates the supply of ecosystem services, which vary by region as well, at multiple scales to perform spatially-explicit absolute environmental sustainability assessment. The proposed framework is demonstrated using an illustrative example of corn production in two regions. The results are discussed in comparison to the conventional approaches. •Spatially-explicit environmental sustainability assessment framework is developed.•The framework integrates existing regional approaches at various spatial scales.•The mathematical formulation for the framework is described in detail.•An illustrative example model is constructed to demonstrate the framework.•The framework gives region-specific environmental sustainability indicator results.