The degradation of permafrost due to global warming is having an adverse impact on the transportation infrastructure of nations near the Arctic including Canada, the Alaskan part of the US, Greenland and Russia. The cost has been estimated as being huge in Alaska alone:
An article that looks at how polar region is affected not just Alaska at:
Pykrete is a really amazing material. Made of water and sawdust frozen, pykrete is far more durable and has a much higher melting point than ice. During WW II there was discussion of using this amazing material for ships. How about Arctic bridges instead? If sawdust is added to the existing permafrost then the melting temperature of the permafrost should be much lower. Due to the lower melting temperature, permafrost dependent transportation infrastructure should last longer in a pykrete form.
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