A recent study by the Cambridge Centre for Alternative Finance reveals that 31% of Ethereum nodes are located in the United States, with the EU hosting about 39%. The research, led by Alexander Neumüller, indicates a concentration of node activity in Western regions, though not heavily in any single country. The study also highlights the reliance on a few cloud service providers, such as Hetzner, AWS, and OVH, for node hosting. The research warns that if over one-third of validators go offline, Ethereum's network finality could be disrupted, affecting the consensus process. This concentration has sparked regulatory discussions, with the SEC citing the U.S. node presence in its jurisdictional considerations. Additionally, the study notes a significant reduction in Ethereum's energy consumption post-Merge, with a 99.98% decline, and a sustainable energy usage exceeding 56%.