| 1 | 2010 was an exceptional year for Greenland' s ice cap. | |
| 2 | I wished I could have been like her instead of the kind of person who said, "Don't you ever worry about the polar ice caps melting?" | |
| 3 | Warm air and surface water are melting the summer polar ice cap. | |
| 4 | The first thing you'll see on Mars will be one of the polar ice caps . | |
| 5 | This year, Shanshan's dad was a pilot on flights over the Polar Cap. |