**5. Conclusions**

In this paper 671 (Q4 in Table 2) and 611 (Q5 in Table 2) peer-reviewed academic publications associated with green jobs (GJs) using Scopus were identified. This study used the VOSviewer software to present a bibliometric analysis and to identify key areas around which the topic of GJs revolves in the literature. Then, identified clusters of keywords were associated with different aspects of green jobs. The very separation of GJs from the total number of jobs contributes to the segmentation of the labor market. The authors would like to emphasize that GJs form a key element of the green labor market [86]. At the same time, based on the analyzed scientific studies, it can be seen that due to the fact of gradual greening of the economy, not all employees who would like to work in GJs will find such employment, despite having the appropriate green competencies and qualifications, as well as being characterized by pro-environmental behavior and attitudes. Hence, to ensure that their green capital is not depreciated based on non-GJs, an alternative is to take up green self-employment. This area should be recognized by policymakers influencing the creation of national policies on labor market issues [87]. The active labor market policy instruments should be developed in the context of supporting green self-employment [63].

The creation of GJs contributes to the need to implement an appropriate management process in business entities so that green human capital is properly used to achieve competitive advantages [88]. In addition, proper management of green human capital in business entities is aimed at preventing its depreciation. Hence, one should notice the emerging theme of green human resource management, or sustainable human resource management, in the scientific studies analyzed. Thus, the emergence of GJs not only causes effects of an economic nature (the need to commit adequate capital to green existing jobs or create new GJs), but also strictly organizational in terms of the need to develop a new model of human capital management in the organization.

**Supplementary Materials:** The following supporting information can be downloaded at https: //www.mdpi.com/article/10.3390/ijerph20042886/s1. Table S1. Syntaxes used in Queries calibration for the Scopus scientific database exploration variants of naming green job; Table S2. Syntaxes used in Queries calibration for the Scopus scientific database exploration variants of naming green collar; Table S3. Syntaxes used in Queries calibration for the Scopus scientific database exploration variants of naming green employment; Table S4. Syntaxes used in Queries calibration for the Scopus scientific database exploration variants of naming environmental job; Table S5. Syntaxes used in Queries calibration for the Scopus scientific database exploration variants of naming sustainability job.

**Author Contributions:** Conceptualization, Ł.J.K. and A.S.; methodology, Ł.J.K. and A.S.; software, Ł.J.K. and A.S.; validation Ł.J.K. and A.S.; formal analysis, Ł.J.K. and A.S.; investigation, Ł.J.K. and A.S.; resources, Ł.J.K. and A.S.; data curation, Ł.J.K. and A.S.; writing—original draft preparation, Ł.J.K. and A.S.; writing—review and editing, Ł.J.K. and A.S.; visualization, Ł.J.K. and A.S.; supervision, Ł.J.K. and A.S.; project administration, Ł.J.K. and A.S.; funding acquisition, Ł.J.K. and A.S. All authors have read and agreed to the published version of the manuscript.

**Funding:** (A.S.) This article has been written within the framework of the PROM Programme for International Exchange of Doctoral Students and Academic Staff Contract No. PPI/PRO/2019/1/00049/U/00001. (Ł.J.K.) This project is financed by the Faculty of Economics and Sociology, University of Lodz; Internal Research Grant title: "Green self-employment as a method of professional activation for the unemployed and economically inactive", project no. B2211201000090.07, decision number 10/2021; total funding amount PLN 21,930.00.

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

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

**Acknowledgments:** The authors thank the anonymous reviewers who attended the double doubleround blind review and editors for their valuable contributions that improved this manuscript. The authors would like to thank Marcin Hernes, Letycja Soloducho-Pelc, and Tomasz Zema (Wroclaw University of Economics and Business, Poland) for their consultation on the selection of calibration keywords and the construction of queries.

**Conflicts of Interest:** The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
