Tiny bits of iron may explain why some icebergs are green
The emerald ice may help shuttle an essential nutrient around marine food webs
![green icebergs](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/03/030419_JR_green-iceberg_feat.jpg?fit=860%2C460&ssl=1)
GREEN SCENE Maybe only 30 out of 1,000 icebergs have a green hue, earning them the nickname “jade bergs.” Now scientists may know why the ice has this unusual color.
Steve Nicol