The list of witnesses invited to testify at tomorrow’s U.S. Congress hearing on the energy usage of bitcoin mining and its consequences has been released, featuring a diverse set of professionals directly and indirectly involved in the industry.

The House will hold the hearing on Thursday as its Energy and Commerce Oversight Subcommittee seeks to get a better understanding of Bitcoin’s power consumption and why it is needed after a cohort of national and international climate-related organizations sent Representatives a letter claiming proof of work (PoW) mining could be hazardous to the world’s climate in the long run.

By Antoni