1 Subjects: “...natural product...”

2 Subjects: “...hydration product...”

3 Subjects: “...human appropriation of net primary production (HANPP)...”

4 Subjects: “...land production function...”

5 Subjects: “...green total factor productivity...”

6 Subjects: “...by-product...”

7 Subjects: “...plant natural product...”

8 Subjects: “...natural product...”

9 Subjects: “...natural products...”

10 Subjects: “...natural products...”

11 Subjects: “...primary production...”

12 Subjects: “...low production...”

13 Subjects: “...standardized production...”

14 Subjects: “...natural products...”

15 Subjects: “...water productivity...”