Title rated 4 out of 5 stars, based on 22 ratings(22 ratings)
DVD, 2017
Current format, DVD, 2017, , Available .
DVD, 2017
Current format, DVD, 2017, , Available . Offered in 0 more formats
Join scientists, experts, and adventurers as they trudge through mountains of snow, climb trees as tall as buildings, and soar high in the air to spy just how these global changes are affecting one of America's greatest wildernesses.
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