**5. Implications and Final Reflection**

The circular economy represents a development opportunity that would lay the foundations for a sustainable recovery. Responding to the problem of the large accumulation of waste will in turn allow progress in solving the climate crisis and thus avoid the loss of valuable habitats.

The present study was developed with the aim of promoting the development of alternative generation systems to reduce dependence on the consumption of oil and other minerals. This will lead to a reduction in the generation of high levels of emissions, which will help the restoration of the battered ecosystems of our planet. Here is an opportunity that the authors believe should be seized as soon as possible.

As shown in this study, there are few development initiatives, particularly in the field of thermoelectric materials, that implement sustainable models. This is striking since what has sparked interest in the development of this technology has been precisely the need to counteract an existing problem. However, there is no awareness of the implications of not adopting an environmental perspective and transforming our way of thinking in order to build a better world for all.

**Author Contributions:** Conceptualization, H.A.C., E.I.G.-V. and A.A.A.; methodology, H.A.C. and C.E.A.; validation, C.E.A. and S.N.M.; investigation, M.C., E.I.G.-V. and H.A.C.; writing—original draft preparation, H.A.C., M.C. and E.I.G.-V.; writing—review and editing, H.A.C., S.N.M. and E.I.G.-V.; supervision, H.A.C.; project administration, H.A.C. and A.A.A.; funding acquisition, H.A.C. and A.A.A. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received financial support from the Colombia Scientific Program within the framework of the call Ecosistema Científico (Contract No. FP44842-218-2018).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** No new data were created or analyzed in this study. Data sharing is not applicable to this article.

**Acknowledgments:** The authors gratefully acknowledge Universidad de Antioquia for the support in this project.

**Conflicts of Interest:** The authors declare no conflict of interest.
