1 Subjects: “...socio-economics benefits...”

2 Subjects: “...costs and benefits...”

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

4 Subjects: “...economic benefits...”

5 Subjects: “...health benefits...”

6 Subjects: “...nitrogen fertilizer economic benefit...”

7 Subjects: “...benefit-cost ratio...”

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