It can cleanly (zero excess carbon) provide vast amounts of energy for direct air capture of CO2 (energy is the biggest barrier for that). The efforts proposed

It can cleanly (zero excess carbon) provide vast amounts of energy for direct air capture of CO2 (energy is the biggest barrier for that). The efforts proposed in the site you linked require huge geological-scale engineering efforts never before attempted. Nuclear is really here and it works well the overwhelmingly vast majority of the time. Don't get me wrong, changing mindsets and reducing consumptive behavior are at the root of the problem as well, just remember that 'perfect' is the enemy of 'good'.