Thermo-ecology: Exergy as a Measure of Sustainability integrates thermo-ecology and exergy replacement cost as a new and original tool called thermo-ecology cost, or TEC. This tool allows for a more inclusive measurement of the impacts of using renewable and non-renewable resources by including the thermodynamics law in decision-making and presenting applications of this tool across industries and lifecycle assessments. It includes ways to investigate these effects more effectively by combining these critical aspects. This combination has emerged as a valuable decision-support tool for policymakers and the industry as they seek to evaluate the impacts of a product or process.