Ventilation pipes in permafrost under Alaska Highway to keep substrate cold so it will not melt and slump the highway surface. Yukon Territory,Canada | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Krasemann, Stephen J. |
Taille de l’image : | 5100 px × 3379 px |
Model Release : | Non requis |
Restrictions : |
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