What Does the Constitution Say About Federal Land Ownership?

https://i2i.org/what-does-the-constitution-say-about-federal-land-ownership/

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Within state boundaries the Constitution grants no authority to retain acreage for unenumerated purposes, such as land for grazing, mineral development, agriculture, forests, or parks.

Betcha didn't know that! Why, then, does the United States government own huge swathes of land in every state in the union? In Idaho, it is over 60%. In Utah, it's more like 80%!