Same as global warming.
Maybe some should travel a bit more and have a look.
Glaciers been around for thousands of years now pop in the last 15, Europe and New Zealand the ones I've seen. Tourist guide, "there used to be a glacier there for the last 20,000 now gone on the last few".
You would have to have your head buried in Confirmation Bias to argue no climate change, or blind, or both.
71c4