Economic and human activities have largely impacted the entire ecosystem, affecting resource waste and land use and causing increased pollution. The decarbonization of the energy sector is essential for economies to realize their climate-policy objectives. This requires significant investments in the infrastructure of low-carbon energy sources; however, resources that are now available are not adequate to satisfy this need. This research aims to analyze the impact of green finance on macroeconomic fundamentals over the period 2000–2020 for G20 countries using several panel data and Machine Learning (ML) techniques. The findings can provide policymakers with a variety of suggestions for enhancing green finance, expanding digital finance, and creating a carbon trading market in order to enhance long-term sustainability.