Ventilation pipes in permafrost under Alaska Highway to keep substrate cold so it will not melt and slump the highway surface. Yukon Territory,Canada | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Krasemann, Stephen J. |
Bildgröße: | 5100 px × 3379 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: |
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