This paper explores the impact of circular economy and the implementation on large scale of the green supply chain concept, highlighting the implications over sustainability, durable development and economic performance. In the actual context of a sustainability-oriented market, integrating green supply chains solutions is no longer a choice but a constraint supported by directives and standards that are adopted internationally. Using a quantitative approach, the research underlines the correlation between the implementation of circular economy and the performance upgrade of the supply chain, demonstrating the impact of these factors on economic and ecologic sustainability and it is developed on two pillars:: the first, company-based, applying a neuronal network prediction model and regressions in order to assess the effects of blockchain implementation, while the second uses time series to observe the elements of green supply chain using the VAR analysis. The results suggest that the adoption of the green supply chain significantly contributes to the reduction of the negative environmental impact, while offering competitive advantages for the enterprises and assuring their adheration to the energetic performance standards. As can be expected, the research is not exhaustive, and it depends on the availability of data and the constant informational update of the interest elements on the chosen subject.