*3.4. Final Remarks*

The review presented in this paper shows that there are several studies whose results prove the sustainability brought by green infrastructures, including permeable pavements, as well as their cost-benefit. However, it can be seen that LCA studies still present a significant heterogeneity of functional units, evaluation limits, phases, processes, parameters and minimum data evaluated, among other components. Thus, the results are often inconsistent, especially when compared to each other, and do not lead to an accurate assessment of the environmental impacts caused by these systems during their life cycles.
