I’m confused on how she’ll survive. Yes, nightblood will keep her alive from the radiation but what about food, water? I assume this death wave and following waves are going to wipe out animals.
Water should be fine, as her blood should be able to process the radiation contained in it. As for Earth’s ecosystem, I can only presume that the radiation, despite causing devastation, will not wipe it out completely. Some species, both plant and animal, are hardier than others and will cope better. Some may develop genetic mutations which enable them to adapt, much like nightbloods. At the very least, there should be just enough food sources such as seaweed, insects, wild herbs and certain types of fungus for her to scrounge. I think this will be the show’s explanation for how Clarke survives. It’s consistent with what they’ve shown before, which is that remnants of the ecosystem survived even the initial nuclear explosions. That forest the kids landed in when they first arrived had to have been several decades, if not several centuries old.