I'll start taking the climate clowns seriously when they start getting serious about nuclear. There is absolutely no other way in hell that we can meet their aspirations without collapsing the global economy... and leading to inevitable famine, war, genocide, etc.

There are a variety of very advanced, modern nuclear designs now available...

SMR's for ease of operation, maintenance, and scalability.

LFTR if you're worried about waste storage and cost.

Is it particularly cheap? No, except for LFTR. But there's no other way... banning carbon fuels and hoping something else will take it's place is not tenable. .Gov needs to build it first, or enable it to be built... then they will come.