Grew up in a country without elevators, as children we were told foreign country landlords stay on the ground floor and rent floors above, might be related to this. I think people there prefer higher floors for privacy and sun, sometimes easier roof access compared to bottom floors

Lead has a very stable nucleolus. Forever chemicals (PFAS) were named that because they were stable. CFCs were pretty harmless too until we learned about ozone layer.

Anything that industry makes and distributes in large quantities throughout the world is pretty bad because by the time we learn about long term impacts, it’s everywhere