Table 12.

The key relationships from C12.

Findings	Relationship
% C12 analyzed in the study sample	100 %
Sustainability effect a desired outcome of PESPs [18,[47], [48], [49]] but failed in many cases [48,77]	I, II→III: + & II→C12: −
Assessing all aspects of sustainability after implementing PESPs is seemly very rare [129]	C12 ⇔ C8, I: −
Achieving the sustainability effect from PESPs is a common challenge, especially in developing nations [100,133]	I, II, C7→III: −
Necessity to understand policy mixes linked to PESPs [47] and to promote a TDA to contribute to achieve sustainability outcomes from PES [98,99,154]	C8, C10→C12: *