This was something different. More observational, less judgemental. I think it had the word environmental in it, but that didn't help build an effective search query. It was specific to the phenomenon of people not noticing a change in climate or ecology because it happens over such a long period.

edit: The article links to this https://en.wikipedia.org/wiki/Creeping_normality

It fits, but it doesn't ring the bell my head is looking for. Maybe that is it. Memory is weird.