The main factor in determining electricity source when mining bitcoin is cost, not production methods. Just like you don't consider how your household electrici

The main factor in determining electricity source when mining bitcoin is cost, not production methods. Just like you don't consider how your household electricity was produced, just that the bill is low. If you're upset about miners' the chunk of energy being produced by coal, you should be concerned about coal usage in overall society. If there's coal-powered electricity is expensive or unavailable for anyone to use, bitcoin miners will automatically stop using it along with the rest of society.