OK....It took awhile but was able to track this down.
In 2017 the Department of Interior, under direction of Ryan Zinke ordered the NPS to remove signs at Glacier National Park that had anything to do with melting of glaciers and climate change. Without getting political it doesn't take much of a search to see who's administration Mr. Zinke served under.. There were some signs in the park that said glaciers in glacier national Park
could be gone as early as the year 2020. This is actually a true statement. Several of the 26 named glaciers are at a level that does not qualify them as glaciers anymore, and all 26 glaciers have seen a minimum of 40% and as high as 80% erosion in the last 50 years. This fact has absolutely nothing to do with the decision to remove the signs.
So move forward to the OP. A prior administration removes signs for political reasons, and those signs' removal leads the OP to conclude that the science is all wrong because the signs were removed...when in fact they were removed for political reasons. Everyone to get it now?.