In a letter to Electric Reliability Council of Texas (ERCOT) CEO Pablo Vegas, U.S. Senator Elizabeth Warren of Massachusetts and six other U.S. lawmakers asked the state of Texas to provide Information about the energy use and potential environmental impact of bitcoin mining operations. The senators called Texas a "safe haven for deregulation" for crypto mining companies, adding that the state's "cheap electricity and laissez-faire regulation" are fueling concerns that mining is adding strain to the national grid.