Divide the number of bitcoin transactions by the power spent mining, and each transaction consumes enough power to run an American household for a day and a half.<p><a href="http:&#x2F;&#x2F;motherboard.vice.com&#x2F;read&#x2F;bitcoin-is-unsustainable" rel="nofollow">http:&#x2F;&#x2F;motherboard.vice.com&#x2F;read&#x2F;bitcoin-is-unsustainable</a>