USA has and has had military bases on Greenland, once established despite opposition from native Greenlanders. Several of these are ecological disasters. There are valleys full of rusting oil drums and machinery. There are fears of there being radioactive waste hidden under the ice, expected to leak sooner or later.
That Denmark had approved some of these bases has fuelled sentiment against Denmark and the US in the first place.
https://www.theguardian.com/world/2025/jan/28/85-of-greenlan...
> But a new survey by pollster Verian, commissioned by the Danish paper Berlingske, showed only 6% of Greenlanders are in favour of becoming part of the US, with 9% undecided.
6%, for practical purposes, means 0%; whenever you have a poll with a clearly insane option, about 4-5% of people will choose it, due to a combination of mistakes and trolling.
About half of Greenlanders support independence (in a concrete sense; far more than that in an abstract sense), but that's rather different to becoming part of the US.