There is currently little evidence to suggest that Bitcoin contributes directly to climate change. Even assuming that Bitcoin mines were exclusively coal-fired – a very unrealistic scenario given that a sizeable number of plants operate exclusively from renewable sources – total carbon dioxide emissions would not exceed 58 million tons of CO2, which would correspond to approximately 0.17% of the world’s total emissions. This does not mean that environmental concerns about Bitcoin’s electricity consumption should be ignored. However, the current figures should be put into perspective: the available data show that even in the worst case scenario (coal-only mining), Bitcoin’s environmental footprint remains at best marginal. A recent study by CoinShares, a cryptocurrency asset management and analysis company, found that most of the electricity used by Bitcoin actually came from clean sources, such as wind, solar and hydro. The only amount of electricity consumed each year by domestic appliances still on but inactive in the United States alone could power the Bitcoin network for 3.1 years.