One example is, when calculating the carbon footprint of the payment processing method like Visa, they fall short to work out the energy required to print money or electric power ATMs, or smartphones, bank branches, stability cars, among the other components during the payment processing and banking supply chain. https://financefeeds.com/mt-gox-moves-more-btc-to-new-wallets-what-it-means-for-the-market/