Excerpts:

When the president talks about security in the Arctic, he’s talking about climate change.

Their aim, the vice president said in a video on X, is to check up on Greenland’s security, because unnamed other countries could “use its territories and its waterways to threaten the United States.” And these are real concerns for the United States, rooted in climate change: As polar ice melts away, superpowers are vying for newly open shipping routes in the Arctic Ocean and largely unexplored mineral and fossil-fuel reserves. Arctic warming could pose a direct threat to America’s security interests too: Alaska could have new vulnerabilities to both China and Russia; changes in ocean salinity and temperature might interfere with submarine detection systems; the extremes of climate change, including permafrost thaw in Russia, could drive economic instability, social unrest, and territorial claims.

So far this term, Trump has acted as if climate change does not matter: He has withdrawn from the Paris Agreement, announced plans to reopen the Arctic National Wildlife Refuge for oil and gas drilling, and paused new offshore-wind development and Inflation Reduction Act clean-energy funding. But if the president’s bid for Greenland—or the U.S. military’s quiet cooperation with Canada to boost Arctic defenses—is any indication, the U.S. is weighing its options for a warmer future. “We live in the real world,” Evan Bloom, a global fellow at the Wilson Center’s Polar Institute and former State Department official, told me. “The military and other agencies will continue to take climate change into account, because they have to.” When he hears Trump talk about Greenland, he hears the president speaking about the geopolitics of climate change—“whether he’s willing to call it that or not.”