I got the glowbull warming lecture about the disappearing ice fields from a ranger at Glacier Park a few years ago.
He was completely unfazed when I asked if just maybe the glaciers have been retreating since the Ice Age.
The Park and Forest Services, not to mention the Fish & Wildlife people, have been well indoctrinated with the junk science that prevails these days. I've spent my life studying past and present geology. I'm astounded almost daily, even here, by how little the majority of people know about their planet's processes, history and the ground they stand on.