US won’t buy Greenland, but world powers are eyeing the Arctic
US President Donald Trump suggested he would be interested in buying the world's largest island. Although Denmark has no desire to sell Greenland, the episode put a focus on the changing geopolitics of the Arctic. Rising temperatures are opening up new shipping lanes and scientists believe over 20 percent of the world's oil and gas reserves are in the region. As a result, world powers are jockeying for influence in the northern reaches of the planet. Plus, learn the English phrase "float an idea."