The Trump administration is negotiating a mineral agreement with Ukraine. It has talked about "getting" Greenland, in part to access the island's mineral wealth. In both cases, the administration is particularly interested in acquiring rare earth elements and reducing its reliance on Chinese supplies.

What do we know about the mineral deposits in these two regions? Will Trump's desire for Greenland's resources spark a geopolitical conflict? Will a U.S. mineral agreement with Ukraine benefit that country?

Volodymyr Vlasiuk, an expert in Ukrainian industry who advises Ukraine’s parliament on economic matters. He is the director of Ukrainian Industry Expertise (Ukrpromzovnishexpertyza).  Klaus Dodds is Professor of Geopolitics at Royal Holloway, University of London, and is coauthor of a forthcoming book called Unfrozen: The Fight for the Future of the Arctic with Yale University Press.