Back in 2007, i visited the Exit Glacier in Alaska. It is a National Park and has a nice visitor center that is a short walk over to the toe of the glacier.
As you approach the visitor canter, two miles out there is a sign 1896 and other years marked as you get progressively closer.
That is, the National Park service has been tracking the glacier retreat for more than a hundred years. The US Government has been measuring the effects of warming for a very very long time.
There were no SUV’s in 1896