SEAN HANNITY (HOST): When he made the comment about the Panama Canal, if you look at the history of the Panama Canal, he's not wrong in what he's saying, and China is involved in the Panama Canal. Greenland. I'd love to see Greenland, you know, become part of the United States. I'd love it.

President-elect Donald Trump ran on a platform of isolating the US from foreign conflicts like the Ukraine war, increasing tariffs on foreign trade partners, and rebuilding domestic manufacturing. But in recent days he has suggested a more outwardly aggressive approach for his foreign policy.

Global warming is making both places more important to global shipping and trade. To imagine the kind of future a hotter, dryer climate may bring, and the geopolitical challenges it will create, look no farther than two parts of the world that Donald Trump wants America to control: Greenland and the Panama Canal.