https://cdnph.upi.com/ph/st/th/2831786218141/2026/upi_com/6d926532b4995dca296f1a4953d7b2c5/v1.5/Trump-linked-oil-firm-prepares-to-drill-in-Greenland-but-lacks-permits.jpg" /> Greenland has issued a "strong warning" to an American oil company linked to President Trump, as it prepares to drill despite lacking proper permits.