1 Subjects: “...exergy cost of biological resources...”

2 Subjects: “...economic costs...”

3 Subjects: “...cost of electricity...”

4 Subjects: “...wastewater treatment costs...”

5 Subjects: “...cost...”

6 Subjects: “...cost–benefit analysis...”

7 Subjects: “...cost...”

8 Subjects: “...cost–benefit analysis...”

9 Subjects: “...cost-benefit analysis...”

10 Subjects: “...cost of transport...”

11 Subjects: “...exergy cost modeling...”

12 Subjects: “...costing...”

13 Subjects: “...cost-benefit function...”