How ethereum and bitcoin are trying to go green

Ethereum, the world's second-largest cryptocurrency, recently implemented a major network upgrade that reduced its energy consumption by 99.9%. But though energy usage has been one of the cryptocurrency industry's biggest targets for critique, it's not likely that bitcoin will follow suit. Instead, bitcoin miners are touting their use of renewables and their benefit to the electrical grid, as they try to green their image. Here's how both networks are trying to become more sustainable.