The waste and inefficiency of Bitcoin and other Blockchain endeavours are estimated to annually consume more than 70 Terawatts (TWh) of electricity, which is more than the entire nation off Ireland.  Bitcoin alone accounts for 57 TerraWattHours.  A single Bitcoin transaction uses as much energy as 300,000 Visa transactions.  Cryptocurrency mining creates as much as 15 million tons of carbon dioxide, the same as 1 million cars.  The Blockchain proof-of-work mining process also creates Tons of Waste in the form of discarded basic hardware, power supplies can't cooling equipment-that often has a lifetime of 1 year or less.  http://Cloudcoin.global, Cloudcoin Consortium-Chico, CA 95928.