The documentary Canary (2023)
https://www.imdb.com/title/tt28668969
"Daring to seek Earth's history contained in glaciers atop the tallest mountains in the world, Doctor Lonnie Thompson's life's work evolves into a salvage mission to recover priceless historical records before they disappear forever."
About the reality of climate change is available to watch in full on youtube over the festive season.
https://www.youtube.com/watch?v=52IHWl2dHNU
Found via #thedailyshow