The link doesn't state whether it's counting only the energy costs incurred by VISA, or if it includes the energy costs of making a transaction on the SWIFT payment network that VISA, Mastercard, banks, and other institutions run on top of. Obviously to do a fair comparison you have to take SWIFT into account, otherwise you're not capturing the true energy cost of making a VISA payment.<p><a href="https://www.investopedia.com/articles/personal-finance/050515/how-swift-system-works.asp" rel="nofollow">https://www.investopedia.com/articles/personal-finance/05051...</a>