This is not always the case. Many jurisdictions and companies pay fixed rates for electricity that they buy from consumers, such as from household solar, and the rates are often abysmal - a tiny fraction of the cost the consumer pays to buy electricity. Often it will be more profitable to use any excess electricity you generate at home to mine bitcoin than to sell it back for a cent or two per kWh.

You sure about that? Want to compare the environmental impact of the US dollar, from printing, moving, handling, etc., through to the electricity for banks, call centers, ATMs, etc., through to the military industrial complex which is built around maintaining its status?