Spoiler warning, although this is only in the first several minutes of the film. I caught it, and I'd love to find out so much more about this Solar Punk world

Spoiler warning, although this is only in the first several minutes of the film. I caught it, and I'd love to find out so much more about this Solar Punk world. One key thing is what happened to it, when Furiousa tried to return and found only a few refugees left.