In Alaska, advocates say reducing prison population is a key climate strategy

Ageing correctional centers and the people within are threatened by floods, extreme heat, and building collapses due to snowfall and thawing permafrost

Over millions of years, glaciers slid across what is now northern Juneau, forming the craggy valleys and alluvial plains of south-east Alaska. Then about 200 years ago, when these glaciers shrank amid rising global temperatures, meltwater flowed downstream, depositing loose, silty soil along bodies of water like Lemon Creek.

In 1969, the state chose to build a prison on this flat land - despite an assessment that the glacial deposits would be poor ... material" for the building's foundation.