You can't say 1.4GWh (energy) for a miner - miners are rated in power (kW) - the "h" part depends on how long you run it.
Energy (TWh) for all humans is computed annually so ~20,000 TWh (first table on that wiki page) - which is Watts of power generated times the length of time over which it was generated - so total Watts (in a year) * total hours (in a year) = Watt-hr (I think it would be OK to call this Watt-hr/annum)
The first couple of times I did this I was WAY off because I sort of ignored that stuff...
I guess it should be checked by rolling everything back to the fundamental units - all the way back to Joules (Watt = J/sec.) and carefully carry the time through the calculation...
DUMB QUESTION: If you order something online and pay with Btc (actually send it), and what you ordered never shows up, you've just been scammed, right? How do you deal with this Btc flaw? (in this way Btc is pretty much like cash - at least with a credit card you're sorta protected from scams - am I seeing this correctly?)
So a million S9's use 1,400 million Watts of power, or 1.4 GigaWatts of power.
The total annual electric energy generated by humanity is about 24,000 TeraWatt-hours. (wikipedia)
Final improved calc (I also made a mistake in original calc)
1.4 Gwh for miners2.31 TWh (2310 Gwh) continuous average for Earth
see
https://en.wikipedia.org/wiki/Electric_energy_consumption1.4/2310=0.0006 or 0.06%
maybe if you count less efficient miners, the real number is 50% higher (although I doubt it because old miners like S7produce 3-4 times less than S9) to 0.1%
0.1% is max, with 0.07-0.075% being more realistic.
However, banks consume at least five times more energy:
https://www.bitsonline.com/bitcoin-vs-banks-uses-energy/
