According to Woocharts data, the percentage of clean or sustainable energy used in mining currently stands at 56.76%. BTC's clean energy use has been steadily increasing since April 2021. The platform uses the Cambridge Center for Alternative Finance's definition of sustainability in its calculations to measure its clean energy use, and the relevant indicators depend on the percentage of crypto mining operations that come from energy sources such as wind, solar, hydro, and even nuclear power. (CoinGape)