As a China-based crypto miner, Canaan has been hit very hard this year. Currently, Canaan is down nearly 85% from its 52-week high, mainly on news of continued Chinese regulatory crackdowns on crypto mining. The U.S. has largely taken over the mantle of the crypto mining jurisdiction of choice for companies. However, today, reports that U.S. Senator Elizabeth Warren sent a letter to Greenidge (NASDAQ:GREE) CEO Jeff Kirt Thursday afternoon has investors in the crypto mining sector spooked. This letter requested more information about the impact crypto mining has on climate change, power prices, and other environmental concerns. Reportedly, this…