The supply chain is a fundamental aspect of businesses and industrial operations. The increasing concern of pollution, resulting from industrial and business activities, has necessitated the development of two lines of the supply chain. The environmental pollution results from a combination of wastes or other pollutants produced by multiple industries and business to have the notable adverse effect; thus, environmental pollution can only be controlled through integrated efforts by all stakeholders. The green supply chain management (GSCM) is an approach adopted to prevent environmental pollution by the adoption of safer methods in industrial production and businesses activities and through the incorporation of views obtained from interaction with the suppliers, consumers and the logistics service providers ( Tseng, Islam, Karia,Fauzi & Afrin, 2018) .
The Credibility of the Paper
The article uses sources, Scopus, and ISI Web of Science, which are accepted widely, the results were filtered and relevant materials obtained for analysis. The process is exhaustive which an important feature of a thoroughly conducted paper. The review is systematic progressing from article identification, screening, determination of eligibility and inclusion ( Tseng et al., 2018) .
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Results
The Journal of Cleaner Production records the highest publications on the subject of GSCM. Its rate of the total number of publications considered in the review is 9.1% ( Tseng et al., 2018) . The 9.1% rate is leading which signifies the interest in GSCM in the production sector. The general trend on the subject of GSCM indicates a growth in the acceptance an adoption of its principles. The progress is also motivated by internal and external factors that are identified as drivers ( Tseng et al., 2018) . More awareness should be created to create a wider platform for the implementation of GSCM, which will initiate a rapid response among companies and businesses to implement GSCM approaches.
Drivers and Barriers
Drivers are pressure exerted on the companies such as compliance issues and government regulations at the external level and organizational structure and goals at the internal level ( Tseng et al., 2018) . For the successful achievement of the global goal of environmental conservation, the driving factors should be enforced to bring companies and other stakeholders in line to adopt GSCM. Other factors include consumer awareness and competition.
The major barriers to the progress of GSCM include factors such as insufficient funds, lack of or inadequate training on the special subject of GSCM and fear to transform from traditional methods to GSCM approaches which requires the use of new technology that will necessitate complex processes of training staff and laying off some ( Tseng et al, 2018) . The identified barriers do not have the same weight of importance as the benefits derived from adopting GSCM. The degree of barriers varies with the environmental location and players in individual companies and businesses, as such, the stakeholders should design a process and system of operations that are in line with the promotion of GSCM based on their circumstances ( Tseng et al., 2018) .
The Role of Suppliers and Consumers in Promoting GSCM
Suppliers and consumers play a central role in the progress of GSCM being located at the extreme ends of the supply chain ( Tseng et al., 2018) . Output depends on the input; suppliers should be governed by a system of regulations requiring either that they deal with companies that observe GSCM or be discontinued in case they supply materials whose use will pollute the environment. The suppliers and the producers depend on the consumer purchasing ability. Consumers are therefore a deciding factor whether a company will continue its operations. Consumers can avoid the purchase of products generated or sold by business and companies dealing with environmentally unfriendly operations. Consumers' opinion should be considered in the supply chain to improve the company's economic development as well as environmental preservation. The promotion of GSCM should be conducted in a united front and incorporate the logistic services providers who harmonize the consumer and supplier differences. The implementation of the results obtained from GSCM referred to as Green Supply Chain Practice (GSCP) that the drivers advocate for ( Tseng et al., 2018) .
GSCM Models
As noted earlier on, the factors surrounding a business or a company vary among businesses and companies. This notwithstanding, the mathematical models and other models used to analyze and estimate the best GSCM approach takes into account the production cost and environmental factors ( Tseng et al., 2018) . The models should be well designed and accurate since the results generated can motivate or de-motivate adoption of GSCM; in cases where the results are undesirable, opponents of GSCM can easily discredit the approach and companies, or business can give it up altogether. Significant models include the use of ANOVA (Analysis of Variance), GRA (gray relational analysis), and fuzzy AHP (Analytic Hierarchy Process) among others ( Tseng et al., 2018) .
Conclusion
Green supply chain management is obtaining a first round in the management of global warming and other environmental pollution. The supply chain determines the commitment of companies and businesses to uphold GSCM measures. The players in the business and company sector should be encouraged to work together in the attainment of environmentally sustainable operations. The extreme players, customers, and suppliers can define the direction of GSCM by resisting products from producers and businesses that operate at variance with GSCM goals. The suppliers can also avoid supplying such entities or be stopped from operations when they supply unacceptable materials. Models should be chosen to analyze the factors at play in the company and business level based on the uniqueness of each player. The results can then be adopted in GSCP practices through the development and enforcement of drivers.
References
Tseng, M., Islam, M. S., Karia, N., Fauzi, F. A., & Afrin, S. (2018). A literature review of green supply chain management: Trends and future challenges. Resources, Conservation & Recycling, 141 , 145-162. DOI:10.1016/j.resconrec.2018.10.009
