Analyzing the Key Industrial Chain of Energy-Food Coupling in the Yangtze River Basin – Based on the Multi-Regional Input-Output Approach

Since 2011, when Hoff first proposed to consider water, energy, and food as an integrated system for resource security [1], the study of the "water-energyfood" (W-E-F) nexus has gradually entered the vision of resource and environmental researchers, and the research on the W-E-F nexus has gradually been deepened and enriched [2][3][4][5].Water is the source of life, the key to production, and the foundation of ecology, and water resources have always been at the core of the W-E-F system, while the energy and food subsystems are subordinate.As an important strategic material reserve in China, energy and food security are related to the overall situation and stability of