i call B.S on many stats in that report
the fools stupidly think if a pool uses XXth and in that country of say 5 power plants only 3 are renewable . they stupidly deem it as the pools XXth is only 60% renewable
reality is that the asic farms set up a warehouse in the region of one of those 3 renewable power stations specifically for the reason of cheap 'excess' electric contracts
and is infact 100% renewable because its getting its power from the renewable power plant direct.
ever since 2014 asic farms have always set up near renewables. its actually the silly residential hobby miners that cant control their home setup. and the percentage in that group is low.
its actually the crappy altcoins that are hashing from hobby homes because no one cares much about altcoins to want to invest in large corporate farms. so its altcoins like doge that are the most carbon dirtiest
...
also saying that bitcoin uses 189twh is B.S
bitcoin for the last year has never ever approached more then say 200exahash EVER
so lets do some math and lets assume if every day was 180exa(no day is equal but lets assume so)
take 2 machines from 2 generations for lower and upper
(a)s19 95thash 3.25kw
(b)s19pro 110thash 3.25kw
(a) (180000000th/95th)
=1894736.842105263 asics
=6157894.736842105 kwh
=6157.894mwh
=6.1579gwh
=53943.15789473684gwh a year
=53.94twh a year
(b) (180000000/110th)
=1636363.636363636 asics
=5318181.818181818 kwh
=5318.181 mwh
=5.318181 gwh
=46587.27gwh a year
=46.587twh a year
meaning AT MOST IF EVERY DAY WAS 180EXA the low and upper bound would be 46-54tw .. not 189tw
(c)even if you do the math of the very very old s9 (14th for 1.4kw)
again if every day had the hashrate of 180exa. then the upper bound would be 157tw
so not having every day as 180exa means all numbers shown above are lower then that.
heck lets do the actual math, the average hashrate is only 138exa over the year.
meaning the tw utilised is somewhere between
(a) 41.35tw
(b) 35.71tw
(c) 120.36tw
meaning at best they are off by 33% at worse they are off by 81%
most of the s9 fangirls moved them crappy outdated hardware over to the altcoins in the mining dip drama of autumn 2018
these days most asics are the s19 range or other brand equivalent
so estimates for 2021 should be more like 35-41tw range. and no where near 189tw