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本周推出的一个名为剑桥比特币电力消耗指数（CBECI）的在线工具，在计算比特币网络的年度能源使用量之前，会实时估算维护比特币网络所需的能源。

目前，CBECI显示，全球比特币网络正在消耗超过7千兆瓦特的电力，相当于一年64太瓦时（1太瓦时=10亿千瓦时）的能源消耗。这比瑞士每年58太瓦时的用电量还要多，略少于哥伦比亚每年68太瓦时的用电量。

这意味着比特币约占全球电力消费总量的0.25%。众所周知，比特币需要大量电力，而全世界的矿工就是用这些电力来运行必要的计算机硬件以维护网络并验证支付。

普华永道的比特币专家亚历克斯德弗里斯估计，比特币每笔交易消耗的能量，超过了全球其它所有银行单笔交易所消耗能量的总和。

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