I never hear about nature catching up to us- its always defeated and in the corner, we remain dominant. But as soon as society crumbles, meet those creatures and plants we couldnt get rid off- hyper adapted to resist us. Plants to which we are extremely allergic, who are resilient to all herbizides and selective bred for maximum spread into our ecologic niche. Animals, who by virtue of surviving in information dense environments, are very stealthy- and very clever. Carrying out of knowledge or instinct diseases and allergic contagions, to drive us further back into domes. Most of our companion animals/plants unable to dwell in the open in the overheated world we created. All the resources we had for the first attempt gone- no easy to reach oil, the best mines old landfills and destroyed citys.

To return from such a dark age, seems unlikely.