The amount of hashpower in USA is both impressive and alarming
New data on Bitcoin mining
Tl;dr version
1. 47.7% of mining now done in US
2. US net emissions from bitcoin are proportionately lower at 39.7% of global bitcoin emission
3. Cambridge model appears to overestimate Bitcoin electricity consumption
4. Bitcoin mining already is highly transparent
Detailed breakdown:
https://batcoinz.com/new-insights-on-bitcoin-mining-and-sustainability/