@Bragato18 10 September 2021 more from that month

Bitcoin Mining Council July 1 2021 “ The BMC revealed that it successfully collected sustainable energy information from over 32 percent of the current global Bitcoin network in its first ever voluntary survey. The results of this survey show that the members of the BMC and participants in the survey are currently utilizing electricity with a 67% sustainable power mix. Based on this data it is estimated that the global mining industry’s sustainable electricity mix had grown to approximately 56 percent, during Q2 2021, making it one of the most sustainable industries globally.” https://bitcoinminingcouncil.com/wp-content/uploads/2021/07/2021.07.01-Mining-Council-Press-Release-Q2.pdf