> It would be cheapest, and 100% in our control, to construct coal plants. Coal is abundant. China builds insane amounts of coal plants to this day. That would provide bountiful cheap energy.

“Cheap” only if you exclude indirect costs due to emissions (both localized effects and less-localized.)

> we reorient towards other types of renewable energy, especially nuclear

nuclear is not renewable (it is low carbon, a feature that is also true of renewables in general, but it is not, itself, a renewable.)