How Vietnam can achieve net-zero carbon emissions in construction and built environment by 2050: An integrated AHP and DEMATEL approach

Abstract

Achieving net-zero carbon emissions (NZCE) by 2050 is a critical global challenge, with the construction and built environment (CBE) sector playing a significant role. Despite its importance, the strategies for Vietnam to achieve NZCE in this sector have been extensively unexplored. This study addresses this gap by employing an integrated Analytical Hierarchy Process (AHP) and Decision-Making Trial and Evaluation Laboratory (DEMATEL) approach to identify and prioritize key strategies for Vietnam's CBE through data collected from sixteen sustainable experts. The results of the AHP model revealed top priorities for achieving NZCE by 2050, namely, establishing circular economy principles in CBE sector, promoting renewable energy use, encouraging low-carbon materials and sustainable technologies, implementing sustainable design and green building standards, and establishing carbon pricing mechanisms and carbon credit implementation. In addition, the DEMATEL model provided insights into the cause-and-effect relationships between these strategies, revealing a “seemingly counterintuitive characteristic” in an emerging economy context. Theoretically, this study contributes to the body of knowledge by providing a robust framework for assessing and prioritizing strategies for achieving NZCE in the CBE sector based on an integrated AHP-DEMATEL approach. Practically, this paper proposed a roadmap with insightful recommendations to help Vietnam's CBE sector achieve NZCE by 2050, supporting policymakers and stakeholders in transitioning to a sustainable, net-zero carbon future.