The idea kinda struck me when i was playing a while ago that the general atmosphere felt like the world itself was dying, espeacially in Cherno or Electro. The large industrial centers of the towns just screams hazards from anything like nuclear, biological, or chemical (NBC for short) decay. After realizing the potential of creating more hazards or "fear" from the environment aside from the zombies, infections, or PvPers, some inudustrial centers are always dangerous, and without constant up-keep they easily fall victim of decay. So keeping up with realism, (to a certain degree) i would think it would be interesting to add "Dead Zones" throughout the map areas that is dangerous to players with out some kind of protection (gas mask or something). These areas wouldnt be massively large, just small areas to increase exploration for players, for example, a small area of cherno's industrial center, would be a Dead zone where people with out gas masks would suffer breathing issues, or could cause blood loss (similar to how the infections work) within these dead zones could be better loot, or certain things to repair vehicles etc. another possibility would have a truck (military or civilian) wreaked on a road and it was seeping chemical waste, the truck was under armed guard by police or military. this would open the possibility of better weapons, or better gear. Remember this is just a thought. I respect constructive criticism anything more then that is not necessary. If you like the idea, jot down a response, if not, say so maturely, or give constructive criticism on how to make it better.