Since nobody has made any better citation, here's one article giving a bit more depth to the issue: https://www.buybitcoinworldwide.com/mining/china/ https://ww

Since nobody has made any better citation, here's one article giving a bit more depth to the issue: https://www.buybitcoinworldwide.com/mining/china/ https://www.buybitcoinworldwide.com/mining/china/ Seems at least half of Bitcoin is currently mined directly using coal.