Humanity currently produces 30 TWh, with roughly 60% of that from fossil fuels. You connect 10 mining rigs. There are two options for what happens to the world's power generation:
1. You affect the mix! Your rigs create new solar and decommission coal plants! The world is cleaner!
2. You claim a "clean slice" of the existing mix. You feel good because you use only solar, but MRI machines still use power, so their mix is now "dirtier" without changing the actual state of the world.
In real systems, it's probably a combination of the above. I assume our decisions only meaningfully matter by exerting market pressures over longer timescales.
1. You affect the mix! Your rigs create new solar and decommission coal plants! The world is cleaner!
2. You claim a "clean slice" of the existing mix. You feel good because you use only solar, but MRI machines still use power, so their mix is now "dirtier" without changing the actual state of the world.
In real systems, it's probably a combination of the above. I assume our decisions only meaningfully matter by exerting market pressures over longer timescales.