If you consider fission power to be unacceptable. I'm not advocating it, but it is the off-the-shelf option that would supply all power without CO2 emissions.

If you consider fission power to be unacceptable. I'm not advocating it, but it is the off-the-shelf option that would supply all power without CO2 emissions. No miracles or unobtanium needed. Not converting everything is a choice, and so is producing nuclear waste.