> say governments use unused hydroelectric power to mine BTC This would be predicated on there being unused hydroelectric power, which there generally is not (

> say governments use unused hydroelectric power to mine BTC This would be predicated on there being unused hydroelectric power, which there generally is not (unless you factor in over production via other means of generating power that are less environmentally friendly). Unlike wind and solar, hydroelectric power is generally very predictable and controllable how much is produced and when.