For years, the primary criticism of blockchain was its massive energy consumption. This was largely due to Proof-of-Work (PoW), the system Bitcoin uses, where powerful computers compete to solve puzzles. However, the narrative shifted dramatically with “The Merge.”
Most modern blockchains now utilize Proof-of-Stake (PoS). Instead of using electricity to secure the network, participants “stake” their tokens. This shift has reduced the energy consumption of networks like Ethereum by over 99.9%. In 2026, the focus has moved toward “Green Mining” for Bitcoin—utilizing stranded methane gas or renewable energy surpluses—making the industry a surprising leader in driving the efficiency of renewable energy grids.