With the world moving towards global warming, a growing population, and the reduction of non-renewable resources, Green Supply Chain Management (GSCM) has recently received increased attention. While green practices are essential in developing a more sustainable performance, the effectiveness of those practices may vary from company to company. The purpose of this study is to showcase various green practices adopted and implemented by companies of different sizes to achieve varying levels of environmental performance. Moreover, to ensure higher sustainability, a company could adopt strategies with the adoption of green practices. The present study is quantitative in nature. The study uses a survey of 100 randomly selected small, medium, and large manufacturing Italian companies listed in the “Bureau van Dijik Electronic Publishing” database about their green practices and environmental performance. The results were analyzed using SPSS. It aimed to analyze whether any relationship existed between different green practices and their impact on environmental performance. This research contributes positively to the literature on the association between GSCM practices and environmental performance. It establishes that company size significantly affects the number and types of green practices implemented and how these can be effectively executed to improve environmental outcomes. The study’s findings tested the hypothesis that different-sized companies integrate different Environmental Management practices and GSCM practices. The study revealed that large companies are more likely to implement green practices than small ones. The findings provide practical insights to managers, particularly those in the manufacturing and logistics sectors, about the GSCM practices likely to yield the best performance benefits. The research offers a nuanced approach to implementing various environmental management practices and to adopting GSCM strategies for a sustainable environment.
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