According to a study published in the June 12 issue of Joule, bitcoin mining produces carbon emissions comparable to Kansas City and even a small country. Researcher Christian Stoll said that the massive energy consumption generated by bitcoin mining translates into a huge carbon footprint. This problem is getting worse as the computing power required to mine Bitcoin has more than doubled since last year. The researchers found that the annual carbon dioxide emissions from bitcoin mining are estimated to be between 22 and 22.9 megatons, between Jordan and Sri Lanka. This level will also double if other cryptocurrencies are considered at the same time.