Humans might be fine with some form of pollution but not others, so "there's less trash and the factory isn't dumping glowing sludge into the bay" doesn't reall

Humans might be fine with some form of pollution but not others, so "there's less trash and the factory isn't dumping glowing sludge into the bay" doesn't really rule out that there's some pollution that's less visible but problematic for a subset of people (or problematic when combined with other factors, e.g. veganism or listening to mumble rap).