I would also welcome a global carbon tax levied at the source (on raw fossil fuel) as it would solve a lot of issues but it's just not gonna happen for politica

I would also welcome a global carbon tax levied at the source (on raw fossil fuel) as it would solve a lot of issues but it's just not gonna happen for political reasons. Given that the global carbon tax is unlikely to happen, we might has well take action against proof of work now since it would still be a net benefit for mankind.