You think we might be better off burning wood and dung instead of solar and nuclear? Carbon free energy requires high technology global civilization. If you make everyone poorer then say goodbye to science and technology, no one cares about those when they’re worrying about how to heat their home and put food on the table.

Can't win a race with a moving finish line. It's never enough, we always want more

We could live completely on renewable energy if we lived like our grandparents, we don't do it, because we want more, more food, more gadgets, more services more entertainment, more tech, more money, more health, &c. it never ends, because we don't have a goal. "get healthier and richer", the vaguest goal you can come up with