Related Clues:
- Global warming panel concern
- Arctic ecosystem
- Arctic area
- Greenhouse gas victim
- Top-of-the-world topper
- Treeless region
- Vast treeless plain
- Mountain peak covering, often
- Caribou's domain
- Cold cover?
- Cold, treeless terrain
- Frozen arctic plain
- Cold sort of headwear found in Greenland
- Frozen covering of polar regions
- Vast level Arctic region with frozen subsoil