Bitcoin's green energy footprint is expanding faster than most realize. According to ESG research, sustainable energy now powers 56.7% of global Bitcoin mining operations—a dramatic leap from just 34% back in 2021. That's nearly a 70% jump in less than four years. What's driving this momentum? New renewable projects keep coming online, making green mining increasingly cost-competitive. As more miners shift toward hydroelectric, solar, and wind farms, expect this percentage to climb even further. The trend signals a major shift: the industry isn't just talking about sustainability anymore—it's actually building it.