News on December 29: According to data from Woocharts, the proportion of clean or sustainable energy used in mining currently stands at 56.76%. Since April 2021, the usage of clean energy for BTC has been steadily increasing. The platform measures its clean energy usage using the Cambridge Alternative Finance Center's definition of sustainability, and the relevant metrics depend on the share of cryptocurrency mining operations powered by energy sources such as wind, solar, hydropower, and even nuclear energy.